Exhibit 2.1       Stock Purchase Agreement, dated June 7, 1996
================================================================================



                            STOCK PURCHASE AGREEMENT


                                     among:


                         MOLECULAR DEVICES CORPORATION,
                             a Delaware corporation,


                            NOVELTECH SYSTEMS, INC.,
                             a Michigan corporation,


                                   BRAD NEAGLE


                                       and


                                 KIRK SCHROEDER



                            Dated as of June 7, 1996


================================================================================









                                TABLE OF CONTENTS
                                                                            Page
Section 1.     SALE AND PURCHASE OF SHARES; RELATED TRANSACTIONS...........  1
      1.1      Sale and Purchase of Shares.................................  1
      1.2      Purchase Price..............................................  1
      1.3      Closing.....................................................  2

Section 2.     REPRESENTATIONS AND WARRANTIES OF NOVELTECH AND THE SELLING
                    SHAREHOLDERS...........................................  3
      2.1      Due Organization; No Subsidiaries; Etc......................  3
      2.2      Articles of Incorporation and Bylaws; Records...............  4
      2.3      Capitalization, Etc.........................................  4
      2.4      Financial Statements........................................  5
      2.5      Real Property...............................................  6
      2.6      Proprietary Assets..........................................  6
      2.7      Contracts...................................................  7
      2.8      Compliance with Legal Requirements..........................  8
      2.9      Governmental Authorizations.................................  9
      2.10     Tax Matters.................................................  9
      2.11     Benefit Plans; ERISA........................................  9
      2.12     Environmental Matters....................................... 10
      2.13     Proceedings; Orders......................................... 10
      2.14     Authority; Binding Nature of Agreements..................... 11
      2.15     Non-Contravention; Consents................................. 11
      2.16     Brokers..................................................... 12
      2.17     Selling Shareholders........................................ 12
      2.18     Full Disclosure............................................. 14

Section 3.     REPRESENTATIONS AND WARRANTIES OF PURCHASER................. 14
      3.1      Due Organization............................................ 14
      3.2      SEC Filings. ............................................... 14
      3.3      Authority; Binding Nature of Agreement...................... 15
      3.4      1933 Act.................................................... 15

Section 4.     COVENANTS OF THE PARTIEs.................................... 15
      4.1      Filings and Consents........................................ 15
      4.2      Noncompetition Agreement.................................... 15
      4.3      General Release............................................. 17
      4.4      Cooperation with Termination of Pension Plan................ 18
      4.5      Registration of Shares.......................................18

Section 5.     MISCELLANEOUS PROVISIONS.................................... 19
      5.1      Survival of Representations and Covenants; Indemnification.. 19
      5.2      Further Assurances.......................................... 20
      5.3      Fees and Expenses........................................... 20
      5.4      Attorneys' Fees............................................. 21
      5.5      Notices..................................................... 21
      5.6      Headings.................................................... 22
      5.7      Counterparts................................................ 22
      5.8      Governing Law............................................... 22
      5.9      Successors and Assigns...................................... 22

                                        i


      5.10     Remedies Cumulative......................................... 22
      5.11     Waiver...................................................... 22
      5.12     Amendments.................................................. 23
      5.13     Severability................................................ 23
      5.14     Parties in Interest......................................... 23
      5.15     Entire Agreement............................................ 23
      5.16     Construction................................................ 23

EXHIBITS

Exhibit A:     Certain Definitions
Exhibit B:     Promissory Note
Exhibit C:     Selling Shareholders Closing Certificate
Exhibit D:     Form of Employment Agreement
Exhibit E:     Form of opinion letter of Seyburn, Kahn, Ginn, Bess, Deitch &
               Serlin
Exhibit F:     Form of opinion letter of Cooley Godward Castro Huddleson & Tatum
Exhibit G:     Territory (Non-competition)

                                       ii




                            STOCK PURCHASE AGREEMENT


                  THIS STOCK  PURCHASE  AGREEMENT (the  "Agreement")  is entered
into as of June 7, 1996, by and among MOLECULAR DEVICES CORPORATION,  a Delaware
corporation (the "Purchaser"),  NOVELTECH SYSTEMS,  INC., a Michigan corporation
("NovelTech"),  and BRAD NEAGLE and KIRK SCHROEDER,  individuals (individually a
"Selling  Shareholder"  and  together  the  "Selling   Shareholders").   Certain
capitalized terms used in this Agreement are defined in Exhibit A.

                                    RECITALS

         A. The Selling  Shareholders  own all of the outstanding  shares of the
common stock of NovelTech (the "Shares").

         B. The Selling Shareholders wish to sell the Shares to the Purchaser on
the terms set forth in this  Agreement and the Purchaser  desires to acquire the
Shares on such terms and conditions.

                                    AGREEMENT

                  The  Purchaser,   NovelTech  and  the  Selling   Shareholders,
intending to be legally bound, agree as follows:

1.       SALE AND PURCHASE OF SHARES; RELATED TRANSACTIONS.

         1.1  Sale  and  Purchase  of  Shares.  At  the  Closing,   the  Selling
Shareholders  shall  sell,  assign,  transfer  and  deliver  the  Shares  to the
Purchaser,  and the  Purchaser  shall  purchase  the  Shares  from  the  Selling
Shareholders,  on the  terms and  subject  to the  conditions  set forth in this
Agreement.

         1.2  Purchase  Price.  The  aggregate  purchase  price  payable  by the
Purchaser for the Shares (the "Purchase Price") shall be as follows:

                  (a) A One Million Five Hundred  Thousand  Dollar  ($1,500,000)
                      cash payment to be made at Closing.

                  (b) A One Million Five Hundred  Thousand  Dollar  ($1,500,000)
cash payment on January 2, 1997 or upon  completion of the  Technology  Transfer
and the  documentation  of the Trade Secrets  pursuant to Section  2.6(g) below,
whichever is later (the "Second Payment Date") as evidenced by a Promissory Note
attached  hereto as Exhibit B. This  payment  is subject to  adjustment  for any
breaches of representations and warranties occurring between the Closing and the
Second  Payment  Date and any other  adjustments  made  pursuant  to Section 5.1
below. The Selling  Shareholders  and the Purchaser  covenant with each other to
use their best efforts to complete the Technology  Transfer on or about November
1, 1996. In the event that Purchaser  does not deem the Technology  Transfer and
the  documentation  of the  Trade  Secrets  pursuant  to  Section  2.6(g)  below
completed  by November 1, 1996, 

                                       1


Purchaser shall notify in writing the Selling Shareholders  advising them of the
shortfall or the necessary steps required to complete said  Technology  Transfer
and Trade Secret  documentation,  and a similar written notice shall be provided
on or  about  the  first  day of  each  subsequent  calendar  month  until  said
Technology Transfer and Trade Secret  documentation are complete.  The Purchaser
shall provide the Selling  Shareholders  with written  notice of any breaches or
adjustments hereunder, and the Selling Shareholders shall have two weeks to cure
such breaches to the reasonable satisfaction of Purchaser (which may be extended
to four weeks in the event that the cure cannot be reasonably  completed  within
such two week period, as long as the cure has been diligently commenced promptly
upon receipt of notice).

                  (c)  An  aggregate  of  146,342  shares  of  Common  Stock  of
Purchaser  authorized  for  issuance  at Closing  (the  "Purchaser  Shares")  as
evidenced by an irrevocable instruction from the Purchaser to its transfer agent
to issue promptly such Purchaser Shares.

                  (d) The aggregate  purchase price, and each component  thereof
including the Purchaser  Shares,  shall be allocated equally between the Selling
Shareholders.

         1.3      Closing.

                  (a) The  closing  of the sale of the  Shares to the  Purchaser
(the  "Closing")  shall take place at the offices of the Cooley  Godward  Castro
Huddleson Castro & Tatum, 5 Palo Alto Square, Palo Alto, California at 3:00 p.m.
(California  time)  on  June 7,  1996  (or at such  other  place  or time as the
Purchaser and the Selling  Shareholders may jointly designate).  For purposes of
this  Agreement,  "Scheduled  Closing  Time"  shall mean the time and date as of
which the Closing is required to take place pursuant to this Section 1.3(a); and
"Closing  Date"  shall mean the time and date as of which the  Closing  actually
takes place.

                  (b) At the Closing (i) the Selling  Shareholders shall deliver
to the Purchaser the stock certificate(s) representing the Shares, duly endorsed
(or accompanied by duly executed stock powers),  and the Purchaser shall pay the
portion of Purchase Price to the Selling  Shareholder as contemplated by Section
1.2(a) and cause the issuance by the transfer agent of Purchaser's  Common Stock
of  the  Purchaser   Shares  pursuant  to  Section  1.2(c);   (ii)  the  Selling
Shareholders  shall execute and deliver to the  Purchaser a  certificate  in the
form of the  Exhibit C  attached  hereto  (the  "Selling  Shareholders'  Closing
Certificate")  setting  forth  the  Selling  Shareholders'  representations  and
warranties that (A) each of the representations and warranties made by NovelTech
and the Selling  Shareholders in this Agreement was accurate and complete in all
respects as of the Closing Date as if made on the Closing Date,  (B) each of the
covenants  and  obligations  that  NovelTech  and the Selling  Shareholders  are
required to have  complied  with or performed  pursuant to this  Agreement at or
prior to the Closing has been duly  complied with and performed in all respects,
(C) each of the  conditions  for  Closing set forth in this  Agreement  has been
satisfied  in all  respects,  and (D) each of the  documents  attached  thereto,
including  the  resolutions  of the  Board  of  Directors  and  Shareholders  of
NovelTech  required to approve the  Agreement and terminate the Pension Plan and
the  articles of  incorporation  and bylaws,  are true and  correct;  (iii) each
Selling 

                                       2


Shareholder   shall  enter  into  an  Employment   Agreement  (the   "Employment
Agreement") as set forth in Exhibit D; and (iv) each Selling  Shareholder  shall
resign as a director and officer of NovelTech.

                  (c) At the  Closing,  Purchaser  shall  receive (i) an opinion
letter from Seyburn,  Kahn, Ginn, Bess,  Deitch & Serlin dated the Closing Date,
in the form of Exhibit E; and (ii) such other  documents  as the  Purchaser  may
request in good faith for the  purpose of (A)  evidencing  the  accuracy  of any
representation  or warranty made by NovelTech or the Selling  Shareholders,  (B)
evidencing the compliance by NovelTech or the Selling  Shareholders  with or the
performance  by  NovelTech  or the  Selling  Shareholders  of, any  covenant  or
obligation  set  forth in this  Agreement,  or (C)  otherwise  facilitating  the
consummation or performance of any of the Transactions.

                  (d)  At the  Closing,  Purchaser  shall  provide  the  Selling
Shareholders (i) an opinion letter from Cooley Godward Castro Huddleson & Tatum,
dated the Closing Date, in the form of Exhibit F; and (ii) such other  documents
as the  Selling  Shareholders  may  request in good faith for the purpose of (A)
evidencing the accuracy of any representation or warranty made by Purchaser, (B)
evidencing the compliance by Purchaser with, or the performance by Purchaser of,
any  covenant  or  obligation  set  forth in this  Agreement,  or (C)  otherwise
facilitating the consummation or performance of any of the Transactions.

2.       REPRESENTATIONS  AND   WARRANTIES   OF   NOVELTECH   AND   THE  SELLING
         SHAREHOLDERS.

                  NovelTech  and each of the  Selling  Shareholders  jointly and
severally represent and warrant, except as contained in the NovelTech Disclosure
Schedule  separately  delivered to the  Purchaser  by NovelTech  and the Selling
Shareholders,  referenced  herein,  to and for the benefit of the Purchaser,  as
follows:

         2.1      Due Organization; No Subsidiaries; Etc.

                  (a)  NovelTech  is  a  corporation  duly  organized,   validly
existing  and in good  standing  under the laws of the State of Michigan and has
all  necessary  power and authority (i) to conduct its business in the manner in
which its business is currently  being  conducted and in the manner in which its
business  is  proposed  to be  conducted;  (ii) to own and  use its  assets  and
properties in the manner in which its assets and properties are currently  owned
and used and in the manner in which its assets and properties are proposed to be
owned and  used;  and  (iii) to  perform  its  obligations  under all  NovelTech
Contracts.

                  (b)  NovelTech  has  never  conducted  any  business  under or
otherwise  used, for any purpose or in any  jurisdiction,  any fictitious  name,
assumed name, trade name or other name, other than the name "NovelTech  Systems,
Inc."

                  (c) To  the  best  Knowledge  of  NovelTech  and  the  Selling
Shareholders,  NovelTech  has not, nor has ever been,  required to be qualified,
authorized,  registered or licensed to do business as a foreign  corporation  in
any 

                                       3



jurisdiction  except  where the failure to so qualify  would not have a material
adverse effect on NovelTech.


                  (d) Part 2.1 of the NovelTech  Disclosure  Schedule accurately
sets forth (i) the names of the members of NovelTech's board of directors,  (ii)
the names of the members of each  committee of  NovelTech's  board of directors,
and (iii) the names and titles of NovelTech's officers.

                  (e) Except as contemplated  by this  Agreement,  NovelTech has
not  ever   approved,   or  commenced  any   proceeding  or  made  any  election
contemplating,  the dissolution or liquidation of NovelTech or the winding up or
cessation of NovelTech's business or affairs.

                  (f)  NovelTech  has no  subsidiaries,  and NovelTech has never
owned,  beneficially  or otherwise,  any shares or other  securities  of, or any
direct or indirect  interest of any nature in, any Entity.  NovelTech  has never
been a party or bound by any joint  venture  agreement,  partnership  agreement,
profit-sharing  agreement,  cost-sharing  agreement,  loss-sharing  agreement or
similar Contract.

         2.2      Articles of Incorporation and Bylaws; Records.

                  (a)  NovelTech  has  delivered to the Purchaser or its counsel
accurate and complete copies of (i) NovelTech's  articles of  incorporation  and
bylaws,  including all amendments thereto;  (ii) NovelTech's stock records;  and
(iii) the  minutes  and other  records  of the  meetings  and other  proceedings
(including any actions taken by written consent or otherwise  without a meeting)
of the  stockholders  of NovelTech,  the board of directors of NovelTech and all
committees of the board of directors of  NovelTech.  There have been no meetings
or other proceedings of the stockholders of NovelTech, the board of directors of
NovelTech or any  committee of the board of directors of NovelTech  that are not
fully reflected in such minutes or other records.

                  (b) To  the  best  Knowledge  of  NovelTech  and  the  Selling
Shareholders,  (i) there has not been any violation of any of the  provisions of
NovelTech's  certificate of incorporation or bylaws or of any resolution adopted
by NovelTech's stockholders,  NovelTech's board of directors or any committee of
NovelTech's board of directors; and (ii) no event has occurred, and no condition
or  circumstance  exists,  that might (with or without  notice or lapse of time)
constitute or result directly or indirectly in such a violation.

                  (c) The books of  account,  stock  records,  minute  books and
other records of NovelTech are accurate,  up-to-date and complete, and have been
maintained in accordance with sound and prudent business  practices.  All of the
records of NovelTech  are or as of the Closing will be in the actual  possession
and direct control of NovelTech.

         2.3      Capitalization, Etc.

                  (a) The  authorized  capital  stock of  NovelTech  consists of
60,000 shares of common stock, of which 10,000 shares  (constituting  all of the
Shares)  have

                                       4



been issued,  are outstanding and are held of record and  beneficially  owned by
the Selling  Shareholders,  in the following amounts:  Brad Neagle, 5,000 shares
and Kirk  Schroeder,  5,000 shares.  Except for the  foregoing,  there is no (i)
outstanding  subscription,  option,  call,  warrant  or  right  (whether  or not
currently  exercisable)  to  acquire  any shares of the  capital  stock or other
securities of NovelTech;  (ii)  outstanding  security,  instrument or obligation
that is or may become  convertible  into or  exchangeable  for any shares of the
capital  stock or other  securities  of NovelTech;  (iii)  Contract  under which
NovelTech is or may become  obligated  to sell or otherwise  issue any shares of
its  capital  stock or any other  securities  or that  creates  or grants to any
Person, or provides for the creation or grant of, any stock appreciation  right,
phantom  stock  right  or  similar  right  or  interest;  or (iv)  condition  or
circumstance that may directly or indirectly give rise to or provide a basis for
the  assertion  of a claim by any  Person  to the  effect  that  such  Person is
entitled to acquire or receive any shares of capital  stock or other  securities
of NovelTech. NovelTech has never repurchased,  redeemed or otherwise reacquired
any shares of capital stock or other securities.


                  (b) The Selling  Shareholders  have,  and the  Purchaser  will
acquire at the Closing, good and valid title to the Shares free and clear of any
Encumbrances.

                  (c) All of the  Shares  (i)  have  been  duly  authorized  and
validly  issued,  (ii) are fully  paid and  non-assessable,  and (iii) have been
issued  in full  compliance  with  all  applicable  securities  laws  and  other
applicable Legal  Requirements.  The Selling  Shareholders have delivered to the
Purchaser accurate and complete copies of the stock certificates  evidencing the
Shares.

         2.4      Financial Statements.

                  (a)  NovelTech  has  delivered to the  Purchaser the following
financial statements (collectively,  the "NovelTech Financial Statements"):  (i)
the unaudited  balance sheet of NovelTech as of March 31, 1996,  and the related
unaudited statement of operations of NovelTech for the year then ended; and (ii)
the  unaudited  balance  sheet of NovelTech  as of May 23, 1996 (the  "Unaudited
Interim Balance Sheet"),  and the related unaudited statements of operations and
cash flows of NovelTech for the partial two months then ended.

                  (b) All of the NovelTech Financial Statements are accurate and
complete in all  material  respects.  The  financial  statements  referred to in
Section  2.4(a)  present  fairly the  financial  position of NovelTech as of the
respective  dates  thereof and the results of  operations  of NovelTech  for the
periods  covered  thereby.  NovelTech  owns, and has good,  valid and marketable
title to, all assets  purported  to be owned by it  reflected  on the  NovelTech
Financial  Statements.  Except  as set  forth  in  Part  2.4  of  the  NovelTech
Disclosure  Schedule,  all existing accounts receivable of NovelTech  (including
those accounts receivable  reflected on the Unaudited Interim Balance Sheet that
have not yet been  collected)  (i) represent  valid  obligations of customers of
NovelTech  arising  from bona fide  transactions  entered  into in the  Ordinary
Course of Business,  and (ii) are current and to the best Knowledge of NovelTech
and the Selling  Shareholders  are collectible in full in the Ordinary Course of
Business.

                                       5



                  (c) Since  NovelTech's  formation,  (i) there has not been any
loss,  damage or  destruction  to,  or any  interruption  in the use of,  any of
NovelTech's  assets  (whether  or not  covered  by  insurance),  except for such
losses,  damage,  interruptions  that are not  material in the  aggregate;  (ii)
NovelTech has not (A) declared,  accrued, set aside or paid any dividend or made
any  other  distribution  in  respect  of  any  shares  of  capital  stock,  (B)
repurchased,  redeemed or otherwise  reacquired  any shares of capital  stock or
other  securities  or (C) made any other  payment  to or on behalf of any of the
Selling Shareholders except as set forth in Part 2.4 of the NovelTech Disclosure
Schedule; (iii) NovelTech has not incurred,  assumed or otherwise become subject
to any  Liability,  other  than  those  identified  on the  NovelTech  Financial
Statements or the NovelTech Disclosure Schedule;  (iv) NovelTech has not entered
into any  transaction,  become a party to any Contract or taken any other action
outside the  Ordinary  Course of  Business;  and (v)  NovelTech  has not agreed,
committed or offered (in writing or otherwise),  and has not attempted,  to take
any of the actions referred to in clauses (i) through (iv) above.

         2.5      Real  Property.  NovelTech  does not own any real property or
any interest in real property,  except for the leaseholds created under the real
property  leases  identified in Part 2.5 of the NovelTech  Disclosure  Schedule.
NovelTech enjoys peaceful and undisturbed possession of such premises.

         2.6      Proprietary Assets.

                  (a) Part 2.6(a) of the NovelTech  Disclosure Schedule contains
a complete and accurate  list and summary  description,  including any royalties
paid or received by NovelTech,  of all  agreements  relating to the  Proprietary
Assets to which NovelTech is a party or by which NovelTech is bound,  except for
any license implied by the sale of a product and common software programs with a
value  of less  than  $500  each.  There  are no  outstanding  and,  to the best
Knowledge of NovelTech and the Selling  Shareholders,  no threatened disputes or
disagreements with respect to any such agreement.

                  (b)  Except  for  those   Proprietary   Assets  identified  as
in-licensed,  NovelTech is the owner of all right, title, and interest in and to
each of the Proprietary Assets, free and clear of any Encumbrances,  and has the
right to use  without  payment  to a third  party all such  Proprietary  Assets.
NovelTech owns or has valid licenses  (identified in paragraph (a) above) to all
of the Proprietary Assets (including  patents and Trade Secrets,  as hereinafter
defined)  necessary  or used to enable  NovelTech to conduct its business in the
manner in which its business is currently  being conducted and it is proposed to
be conducted, free and clear of any Encumbrances.

                  (c)  NovelTech  and the  Selling  Shareholders  have taken all
reasonable measures and precautions necessary to protect the confidentiality and
value of each Proprietary  Asset identified or required to be identified in Part
2.6(a) of the NovelTech Disclosure Schedule.

                  (d)  Except  as  described  in Part  2.6(d)  of the  NovelTech
Disclosure  Schedule,  NovelTech is not infringing,  causing the infringement or
aiding  the  infringement,  and  has  not  at any  time  infringed,  caused  the
infringement,  or aided

                                       6



the infringement,  or received any notice or other  communication (in writing or
otherwise) of any actual,  alleged,  possible or potential  infringement of, any
Proprietary  Asset owned or used by any other Person.  To the best  Knowledge of
NovelTech and the Selling  Shareholders,  no other Person is infringing,  and no
Proprietary Asset owned or used by any other Person infringes or conflicts with,
any Proprietary Asset owned or used by NovelTech.

                  (e) The Selling  Shareholders  are now,  and have always been,
the only  employees  of  NovelTech.  Except as  disclosed  on Part 2.6(e) of the
NovelTech  Disclosure  Schedule,  NovelTech has not employed any other employee,
consultant or agent for the  development  or  manufacture of its products or the
Proprietary Rights (including the Patents and the Trade Secrets). All employees,
consultants and other agents of NovelTech,  including the Selling  Shareholders,
having  any  claim  of  inventorship  or  ownership  in the  Proprietary  Assets
(including  Patents and Trade Secrets),  have executed  written  agreements with
NovelTech that assign to NovelTech all rights and full and complete title to any
and  all  Proprietary   Assets  and  any  and  all   inventions,   improvements,
discoveries,  or  information  relating to the  business of  NovelTech  and have
released  all claims of ownership in and rights to practice or license the same.
To the best Knowledge of NovelTech and the Selling Shareholders,  no employee of
NovelTech,  including the Selling  Stockholders,  has entered into any agreement
that  restricts  or  limits  in any way the  scope or type of work in which  the
employee  may be engaged or  requires  the  employee  to  transfer,  assign,  or
disclose information concerning his work to anyone other than NovelTech.

                  (f) Part 2.6(f) of the NovelTech  Disclosure Schedule contains
a complete and accurate list of all patents and patent  applications owned by or
licensed to  NovelTech  (collectively,  "Patents").  Except as disclosed in Part
2.6(f) of the NovelTech Disclosure Schedule, all of the Patents are currently in
compliance  with  formal  legal  requirements   (including  payment  of  filing,
examination,  and maintenance  fees and proofs of working or use), are valid and
enforceable,  and are not  subject to any  maintenance  fees or taxes or actions
falling due within  ninety days after the Closing  Date. No Patents have been or
are now  involved  in any  interference,  reissue,  reexamination,  or  opposing
proceeding.  To  the  best  of  Selling  Shareholders'  Knowledge,  there  is no
potentially interfering patent or patent application of any third party.

                  (g) With respect to all know-how, trade secrets,  confidential
information,   software,  technical  information,   process  technology,  plans,
drawings, and blue prints owned or licensed to NovelTech  (collectively,  "Trade
Secrets"), the documentation,  if any, relating to each Trade Secret is or will,
no later than the Second Payment Date be, current,  accurate,  and sufficient in
detail and content to  identify  and explain it and to allow its full and proper
use without reliance on the special Knowledge or memory of others. NovelTech and
the Selling  Shareholders  have taken all reasonable  precautions to protect the
secrecy, confidentiality, and value of the Trade Secrets.

         2.7 Contracts. Part 2.7 of the NovelTech Disclosure Schedule identifies
and provides an accurate and complete  description  of each  NovelTech  Contract
that requires  payment by or to NovelTech of more than  $10,000,  except for any
Excluded  Contract.  NovelTech  has  delivered  to the  Purchaser  accurate  and
complete  copies  of

                                       7



all  NovelTech  Contracts  identified  in Part 2.7 of the  NovelTech  Disclosure
Schedule,  including all amendments  thereto. To the best Knowledge of NovelTech
and the Selling Shareholders, each NovelTech Contract is valid and in full force
and effect, and is enforceable by NovelTech in accordance with its terms. To the
best of Knowledge of NovelTech and the Selling Shareholders, except as set forth
in Part 2.7 of the NovelTech Disclosure Schedule,  (i) no Person has violated or
breached,  or declared or committed any default under,  or indicate an inability
to perform or a desire to renegotiate, any NovelTech Contract; (ii) no event has
occurred,  and no circumstance or condition exists,  that would (with or without
notice  or lapse of time)  (A)  result  in a  violation  or breach of any of the
provisions of any NovelTech Contract by NovelTech, (B) give any Person the right
to declare a default or exercise any remedy under any  NovelTech  Contract,  (C)
give any Person the right to  accelerate  the  maturity  or  performance  of any
NovelTech  Contract,  or (D) give any Person the right to cancel,  terminate  or
modify any NovelTech  Contract;  (iii)  NovelTech has not received any notice or
other  communication  (in writing or otherwise)  regarding any actual,  alleged,
possible or potential  violation or breach of, or default  under,  any NovelTech
Contract;  and  (iv)  NovelTech  has not  waived  any of its  rights  under  any
NovelTech  Contract.  To  the  best  Knowledge  of  NovelTech  and  the  Selling
Shareholders,  the performance of the NovelTech Contracts will not result in any
violation of or failure to comply with any Legal Requirement,  except where such
violation  or  noncompliance  would  not  have  a  material  adverse  effect  on
NovelTech.  The Contracts  identified  in Part 2.7 of the  NovelTech  Disclosure
Schedule and the Excluded Contracts collectively constitute all of the Contracts
necessary to enable NovelTech to conduct its business in the manner in which its
business is currently being conducted and is proposed to be conducted. Except as
set forth in Part 2.7 of the NovelTech Disclosure  Schedule,  NovelTech is not a
party to or bound by, and  NovelTech  has never been a party to or bound by, any
employment agreement or any union contract,  collective  bargaining agreement or
similar   Contract.   To  the  best  Knowledge  of  NovelTech  and  the  Selling
Shareholders,  no officer or employee of  NovelTech is subject to any Order that
prohibits  such officer or employee from engaging in or continuing  any conduct,
activity or practice relating to NovelTech's business.

         2.8  Compliance  with  Legal  Requirements.  To the best  Knowledge  of
NovelTech and the Selling  Shareholders,  except as set forth in Part 2.8 of the
NovelTech  Disclosure  Schedule,  (i) NovelTech is in full  compliance with each
Legal  Requirement that is applicable to it or to the conduct of its business or
the ownership or use of any of its assets;  (ii) NovelTech has at all times been
in full compliance with each Legal  Requirement  that is or was applicable to it
or to the conduct of its business or the  ownership or use of any of its assets;
(iii) no event has occurred, and no condition or circumstance exists, that would
(with or  without  notice or lapse of time)  constitute  or result  directly  or
indirectly in a violation by NovelTech of, or a failure on the part of NovelTech
to comply with, any Legal Requirement; and (iv) NovelTech has never received, at
any time, any notice or other  communication  (in writing or otherwise) from any
Governmental  Body  or any  other  Person  regarding  (A) any  actual,  alleged,
possible  or  potential  violation  of, or  failure  to comply  with,  any Legal
Requirement, or (B) any actual, alleged, possible or potential obligation on the
part of  NovelTech to  undertake,  or to bear all or any portion of the cost of,
any cleanup or any  remedial,  corrective or response  action of any nature;  in
each case,  except for

                                       8



such  non-compliance  or violation that would not have a material adverse effect
on NovelTech.

         2.9  Governmental  Authorizations.   NovelTech  has  delivered  to  the
Purchaser accurate and complete copies of all of the Governmental Authorizations
identified  in Part 2.9 of the  NovelTech  Disclosure  Schedule,  including  all
renewals  thereof  and all  amendments  thereto  and, to the best  Knowledge  of
NovelTech and the Selling Shareholders,  they constitute all of the Governmental
Authorizations  necessary (x) to enable NovelTech to conduct its business in the
manner in which its business is  currently  being  conducted,  and (y) to permit
NovelTech  to own and use its assets in the  manner in which they are  currently
owned and used. To the best Knowledge of NovelTech and the Selling Shareholders,
each Governmental  Authorization identified or required to be identified in Part
2.9 of the NovelTech  Disclosure Schedule is valid and in full force and effect.
To the best Knowledge of NovelTech and the Selling  Shareholders,  except as set
forth in Part 2.9 of the NovelTech  Disclosure  Schedule,  (i) NovelTech and its
employees  are, and have at all times been, in full  compliance  with all of the
terms  and  requirements  of  each   Governmental   Authorization,   except  for
noncompliance  that would not have a material adverse effect on NovelTech;  (ii)
no event has occurred, and no condition or circumstance exists, that might (with
or  without  notice  or lapse of time) (A)  constitute  or  result  directly  or
indirectly in a violation of or a failure to comply with any term or requirement
of any  Governmental  Authorization  identified  or required to be identified in
Part 2.16 of the  NovelTech  Disclosure  Schedule,  or (B)  result  directly  or
indirectly in the revocation, withdrawal, suspension, cancellation,  termination
or modification of any Governmental Authorization, except for noncompliance that
would not have a material adverse effect on NovelTech;  (iii) neither  NovelTech
nor any of its employees has ever received any notice or other communication (in
writing or otherwise) from any  Governmental  Body or any other Person regarding
(A) any actual, alleged, possible or potential violation of or failure to comply
with  any  term or  requirement  of any  Governmental  Authorization  or (B) any
actual,  proposed,  possible or potential  revocation,  withdrawal,  suspension,
cancellation, termination or modification of any Governmental Authorization; and
(iv) all  applications  required  to have  been  filed  for the  renewal  of the
Governmental  Authorizations  have been duly  filed on a timely  basis  with the
appropriate  Governmental  Bodies,  and each other notice or filing  required to
have been given or made with  respect to such  Governmental  Authorizations  has
been duly  given or made on a timely  basis  with the  appropriate  Governmental
Body.

         2.10 Tax Matters.  Except as set forth in Section 2.10 of the NovelTech
Disclosure  Statement,  each Tax  required to have been paid,  or claimed by any
Governmental  Body to be  payable,  by  NovelTech  (whether  pursuant to any Tax
Return or otherwise)  has been duly paid in full or on a timely  basis.  Any Tax
required to have been  withheld or collected by NovelTech has been duly withheld
and collected;  and (to the extent  required) each such Tax has been paid to the
appropriate Governmental Body.

         2.11  Benefit  Plans;  ERISA.  Part  2.11 of the  NovelTech  Disclosure
Schedule  provides a complete list of each Current  Benefit Plan.  NovelTech has
never established,  adopted, maintained, sponsored, contributed to, participated
in or incurred any Liability with respect to any Employee  Benefit Plan,  except
for the

                                       9



NovelTech Plans  identified in Part 2.11 of the NovelTech  Disclosure  Schedule;
and  NovelTech  does not  currently  provide any other  benefit  that may not be
discontinued  without  further  liability  upon not more than  thirty  (30) days
notice,  except as set forth in Part 2.11 of the NovelTech  Disclosure Schedule.
No NovelTech Plan (i) provides or provided any benefit guaranteed by the Pension
Benefit Guaranty  Corporation;  (ii) is or was a "multiemployer plan" as defined
in  Section  4001(a)(3)  of ERISA;  or (iii) is or was  subject  to the  minimum
funding  standards  of Section 412 of the Code or Section  302 of ERISA.  To the
best Knowledge of NovelTech and the Selling  Shareholders,  each Current Benefit
Plan has been and is being operated and administered in full compliance with the
provisions thereof and of ERISA,  except where failure to do so would not have a
material adverse effect upon NovelTech, and each NovelTech Plan has at all times
been  substantially  operated  and  administered  in full  compliance  with  the
provisions  thereof and of ERISA.  To the best  Knowledge of  NovelTech  and the
Selling  Shareholders,  each  contribution  or other payment that is required to
have been accrued or made under or with respect to any  NovelTech  Plan has been
duly accrued or made on a timely basis.  Except as set forth in Part 2.11 of the
NovelTech  Disclosure  Schedule,  NovelTech has not knowingly advised any of its
employees (in writing or  otherwise)  that it intends or expects to establish or
sponsor any  Employee  Benefit Plan or to provide or make  available  any fringe
benefit or other benefit of any nature in the future.

         2.12 Environmental  Matters. To the best Knowledge of NovelTech and the
Selling  Shareholders,  NovelTech  is not liable or  potentially  liable for any
response cost or natural  resource  damages under Section  107(a) of CERCLA,  or
under any other  similar Legal  Requirement,  at or with respect to any site. To
the best  Knowledge of NovelTech  and the Selling  Shareholders,  NovelTech  has
never received any notice or other  communication (in writing or otherwise) from
any Governmental Body or other Person regarding any actual, alleged, possible or
potential  Liability  arising  from or  relating  to the  presence,  generation,
manufacture,   production,   transportation,    importation,   use,   treatment,
refinement,  processing,  handling,  storage,  discharge,  release,  emission or
disposal  of any  Hazardous  Material.  Except  as set forth in Part 2.12 of the
NovelTech  Disclosure  Schedule,  to the best  Knowledge  of  NovelTech  and the
Selling  Shareholders,  NovelTech has never generated,  manufactured,  produced,
transported,  imported,  used, treated,  refined,  processed,  handled,  stored,
discharged,  released or disposed of any Hazardous Material (whether lawfully or
unlawfully).

         2.13  Proceedings;  Orders.  Except  as set  forth in Part  2.13 of the
NovelTech  Disclosure  Schedule,  there is no pending Proceeding,  and no Person
has, to the best Knowledge of NovelTech and the Selling Shareholders, threatened
to commence any Proceeding (i) that involves NovelTech or that otherwise relates
to or would  affect  NovelTech's  business or any of the assets owned or used by
NovelTech  (whether or not NovelTech is named as a party thereto);  or (ii) that
challenges, or that may have the effect of preventing,  delaying, making illegal
or otherwise  interfering with, any of the Transactions.  Except as set forth in
Part  2.13 of the  NovelTech  Disclosure  Schedule,  to the  best  Knowledge  of
NovelTech and the Selling  Shareholders,  no event has  occurred,  and no claim,
dispute or other  condition  or  circumstance  exists,  that would  directly  or
indirectly  give  rise to or serve as a basis for the  commencement  of any such
Proceeding.  There is no Order to which NovelTech, or any of the assets owned or
used by NovelTech (including the Proprietary Assets, Patents and Trade

                                       10




Secrets),  is subject; and the Selling Shareholders are not subject to any Order
that  relates to  NovelTech's  business or to any of the assets owned or used by
NovelTech (including the Proprietary Assets,  Patents and Trade Secrets). To the
best Knowledge of NovelTech and the Selling  Shareholders,  there is no proposed
Order that,  if issued or  otherwise  put into  effect,  (x) may have an adverse
effect on NovelTech's  business,  condition,  assets,  liabilities,  operations,
financial  performance,  net  income or  prospects  (or on any aspect or portion
thereof) or on the ability of  NovelTech or the Selling  Shareholders  to comply
with or  perform  any  covenant  or  obligation  under any of the  Transactional
Agreements,  or (y) may have the effect of preventing,  delaying, making illegal
or otherwise interfering with any of the Transactions.

         2.14  Authority;  Binding  Nature  of  Agreements.  NovelTech  has  the
absolute  and  unrestricted  right,  power and  authority  to enter  into and to
perform its obligations  under this Agreement;  and the execution,  delivery and
performance  by NovelTech of this  Agreement  have been duly  authorized  by all
necessary  action  on the  part of  NovelTech  and its  shareholders,  board  of
directors and officers.  This Agreement constitutes the legal, valid and binding
obligation of NovelTech,  enforceable  against  NovelTech in accordance with its
terms. Each of the Selling Shareholders has the absolute and unrestricted right,
power and  capacity  to enter into and to  perform  his  obligations  under this
Agreement  and  each of the  Transactional  Agreements  to  which  such  Selling
Shareholder  is or may become a party.  This  Agreement  constitutes  the legal,
valid and binding obligation of the Selling  Shareholders,  enforceable  against
the Selling  Shareholders  in accordance  with its terms.  Upon the execution of
each of the other  Transactional  Agreements at the Closing,  each of such other
Transactional Agreements will constitute the legal, valid and binding obligation
of  Selling   Shareholders,   and  will  be  enforceable  against  such  Selling
Shareholders in accordance with its terms.

         2.15 Non-Contravention;  Consents.  Except as set forth in Part 2.15 of
the NovelTech Disclosure Schedule,  neither the execution and delivery of any of
the Transactional Agreements,  nor the consummation or performance of any of the
Transactions,  will directly or indirectly  (with or without  notice or lapse of
time)  contravene,  conflict  with or  result in a  violation  of (i) any of the
provisions of NovelTech's  certificate of incorporation  or bylaws,  or (ii) any
resolution adopted by NovelTech's  stockholders,  NovelTech's board of directors
or any committee of  NovelTech's  board of directors;  to the best  Knowledge of
NovelTech and the Selling Shareholders, contravene, conflict with or result in a
violation  of,  or give any  Governmental  Body or  other  Person  the  right to
challenge any of the Transactions or to exercise any remedy or obtain any relief
under,  any  Legal  Requirement  or any  Order to  which  NovelTech  or  Selling
Shareholder,  or any of the assets owned or used by NovelTech, is subject; cause
NovelTech, the Purchaser or any affiliate of the Purchaser to become subject to,
or to become  liable for the payment of, any Tax;  cause any of the assets owned
or used by NovelTech  to be  reassessed  or revalued by any taxing  authority or
other  Governmental  Body;  to the best  Knowledge of NovelTech  and the Selling
Shareholders,  contravene,  conflict

                                       11




with or result in a violation  of any of the terms or  requirements  of, or give
any Governmental Body the right to revoke, withdraw,  suspend, cancel, terminate
or modify,  any Governmental  Authorization  that is held by NovelTech or any of
its employees or that otherwise relates to NovelTech's business or to any of the
assets owned or used by  NovelTech;  to the best  Knowledge of NovelTech and the
Selling  Shareholders,  contravene,  conflict  with or result in a violation  or
breach of, or result in a default under, any provision of any material NovelTech
Contract; to the best Knowledge of NovelTech and the Selling Shareholders,  give
any Person the right to (i) declare a default or exercise  any remedy  under any
NovelTech Contract, (ii) accelerate the maturity or performance of any NovelTech
Contract, or (iii) cancel,  terminate or modify any material NovelTech Contract;
to the best  Knowledge of NovelTech  and the Selling  Shareholders,  contravene,
conflict  with or result  in a  violation  or  breach of or a default  under any
provision  of, or give any  Person  the right to  declare a default  under,  any
material  Contract to which  NovelTech or Selling  Shareholders is a party or by
which  NovelTech or Selling  Shareholder is bound;  or, to the best Knowledge of
NovelTech and the Selling Shareholders,  result in the imposition or creation of
any  Encumbrance  upon or with  respect to any asset owned or used by  NovelTech
(including the Proprietary  Assets,  Patents and Trade  Secrets).  Except as set
forth in Part 2.15 of the NovelTech Disclosure  Schedule,  neither NovelTech nor
the Selling  Shareholders  were, are or will be required to make any filing with
or give any notice to, or to obtain any Consent  from,  any Person in connection
with the  execution and delivery of any of the  Transactional  Agreements or the
consummation or performance of any of the Transactions.

         2.16 Brokers. Neither NovelTech nor any of the Selling Shareholders has
agreed or become  obligated to pay, or has taken any action that might result in
any Person  claiming  to be  entitled  to  receive,  any  brokerage  commission,
finder's  fee  or  similar  commission  or  fee in  connection  with  any of the
Transactions.

         2.17     Selling Shareholders.

                  (a) The Selling  Shareholders  have the capacity and financial
capability  to  comply  with  and  perform  all of  such  Selling  Shareholders'
covenants and obligations  under each of the  Transactional  Agreements to which
such Selling Shareholders are or may become a party.

                  (b) Each  Selling  Shareholder  (i) has not, at any time,  (A)
made a general assignment for the benefit of creditors,  (B) filed, or had filed
against such Selling Shareholder, any bankruptcy petition or similar filing, (C)
suffered  the  attachment  or other  judicial  seizure  of all or a  substantial
portion of such  Selling  Shareholder's  assets,  (D)  admitted in writing  such
Selling Shareholder's  inability to pay such Selling Shareholder's debts as they
become due,  (E) been  convicted  of, or pleaded  guilty to, any felony,  or (F)
taken or been the subject of any action that may have an adverse  effect on such
Selling  Shareholder's  ability to comply  with or perform  any of such  Selling
Shareholder's   covenants  or  obligations   under  any  of  the   Transactional
Agreements;  or (ii) is not subject to any Order that may have an adverse effect
on such  Selling  Shareholder's  ability to comply with or perform  such Selling
Shareholder's   covenants  or  obligations   under  any  of  the   Transactional
Agreements.

                  (c)  There  is  no  Proceeding  pending,  and  no  Person  has
threatened to commence any  Proceeding,  that may have an adverse  effect on the
ability  of each  Selling  Shareholder  to comply  with or  perform  any of such
Selling  Shareholder's  covenants or obligations  under any of the Transactional
Agreements. To the best Knowledge of NovelTech and the Selling Shareholders,  no
event has occurred,  and no

                                       12



claim, dispute or other condition or circumstance exists, that would directly or
indirectly  give  rise to or serve as a basis for the  commencement  of any such
Proceeding.

                  (d)        Each Selling Shareholder:

                             (i) is acquiring the  Purchaser  Shares for his own
         account,  not as nominee or agent,  for  investment and not with a view
         to, or for  resale  in  connection  with,  any  distribution  or public
         offering  thereof  within the meaning of the Securities Act of 1933, as
         amended (the "1933 Act");

                             (ii) understands that (A) the Purchaser Shares have
         not  been  registered  under  the  1933  Act or  pursuant  to  Michigan
         securities laws by reason of specific exemptions  therefrom,  that such
         Purchaser  Shares must be held by him  indefinitely,  and that he must,
         therefore,  bear the  economic  risk of such  investment  indefinitely,
         unless a subsequent  disposition  thereof is registered  under the 1933
         Act  and  the  Michigan   securities   laws  or  is  exempt  from  such
         registrations;  (B) the  certificate  representing  the shares  will be
         endorsed with legends in substantially  the following forms (and may be
         endorsed  with any other legend that may be required by any  applicable
         securities law):

                  "THESE   SECURITIES  HAVE  NOT  BEEN   REGISTERED   UNDER  THE
                  SECURITIES  ACT OF  1933.  NO SALE  OR  DISPOSITION  OF  THESE
                  SECURITIES MAY BE EFFECTED  WITHOUT AN EFFECTIVE  REGISTRATION
                  STATEMENT   RELATED   THERETO   OR  AN   OPINION   OF  COUNSEL
                  SATISFACTORY  TO THE  COMPANY  THAT SUCH  REGISTRATION  IS NOT
                  REQUIRED  UNDER THE ACT OR RECEIPT OF A NO ACTION  LETTER FROM
                  THE SECURITIES AND EXCHANGE COMMISSION."

                  "THE  SHARES  REPRESENTED  BY THIS  CERTIFICATE  HAVE NOT BEEN
                  REGISTERED UNDER THE MICHIGAN UNIFORM  SECURITIES ACT, FEDERAL
                  SECURITIES  LAWS, OR THE  SECURITIES  LAWS OF ANY OTHER STATE,
                  AND SUCH SHARES MAY NOT BE TRANSFERRED WITHOUT COMPLIANCE WITH
                  THE MICHIGAN  UNIFORM  SECURITIES ACT,  APPLICABLE  SECURITIES
                  LAWS OF OTHER STATES, AND THE FEDERAL SECURITIES LAWS."

         and (C) the Purchaser  will instruct any transfer agent not to register
         the transfer of any of the shares  unless the  conditions  specified in
         the foregoing legend are satisfied;

                             (iii) has been  furnished  with such  materials and
         has been given access to such information  relating to the Purchaser as
         he or his  qualified  representative  has  requested  and  he has  been
         afforded the opportunity to ask questions regarding the Purchaser,  all
         as he has found necessary to make an informed investment decision;

                             (iv)  by  reason  of  his   business  or  financial
         experience, or the business or financial experience of his professional
         advisor,  has the capacity to protect his own  interests in  connection
         with this transaction.

                                       13




         2.18 Full Disclosure.  None of the Transactional Agreements contains at
Closing any untrue  statement of material  fact;  and none of the  Transactional
Agreements  omits or will omit to state any material fact  necessary to make any
of the representations,  warranties or other statements or information contained
therein  not  misleading.  Except  as set  forth in Part  2.18 of the  NovelTech
Disclosure  Schedule,  there is no fact within the Knowledge of NovelTech or the
Selling  Shareholders  (other than publicly known facts relating  exclusively to
political  or  economic  matters of general  applicability  that will  adversely
affect all Comparable  Entities) that (i) may have a material  adverse effect on
NovelTech's business,  condition,  assets,  liabilities,  operations,  financial
performance, net income or prospects (or on any aspect or portion thereof) or on
the ability of NovelTech or the Selling  Shareholders  to comply with or perform
any covenant or obligation under any of the  Transactional  Agreements,  or (ii)
may have the  effect  of  preventing,  delaying,  making  illegal  or  otherwise
interfering  with any of the  Transactions.  All of the information set forth in
the NovelTech  Disclosure  Schedule,  and all other  information  related to the
Transactions, as well as information related to NovelTech's business, condition,
assets,  liabilities,   operations,   financial  performance,   net  income  and
prospects,  that has been furnished  pursuant to this Agreement to the Purchaser
or any of its  Representatives  by or on  behalf  of  NovelTech  or the  Selling
Shareholders  or any of their  Representatives,  is accurate and complete in all
material  respects.  NovelTech  and the Selling  Shareholders  have provided the
Purchaser and the Purchaser's  Representatives  with full and complete access to
all of NovelTech's records and other documents and data.

3.       Representations and Warranties of Purchaser.

         The Purchaser  represents  and warrants,  to and for the benefit of the
Selling Shareholders, as follows:

         3.1  Due  Organization.  Purchaser  is a  corporation  duly  organized,
validly  existing and in good  standing  under the laws of the State of Delaware
and has all necessary  power and authority to conduct its business in the manner
in which its business is currently  being  conducted  and in the manner in which
its  business  is  proposed  to be  conducted;  to own and use its assets in the
manner in which its  assets  are  currently  owned and used and in the manner in
which  its  assets  are  proposed  to be owned  and  used;  and to  perform  its
obligations under this Agreement.

         3.2 SEC Filings.  Since December 12, 1995, Purchaser has filed with the
Securities  and  Exchange  Commission  all  reports,  statements,   registration
statements  and other  filings  (including  all notes,  exhibits  and  schedules
thereto and  documents  incorporated  by reference  therein)  ("Purchaser's  SEC
Filings")  that Purchaser was and is required to file under the 1933 Act and the
Securities  Exchange Act of 1934,  as amended,  and  Purchaser is current in all
such filings. The Purchaser's SEC Filings did not contain, at the time of filing
thereof,  any untrue  statement  of a material  fact or omit to state a material
fact required to be stated therein or necessary to make the statements  therein,
in light of the circumstances  under which they were made, not misleading,  and,
to the extent required such filings have been appropriately  updated to keep the
information therein current.

                                       14




         3.3 Authority; Binding Nature of Agreement. The execution, delivery and
performance of this  Agreement by the Purchaser has been duly  authorized by all
necessary  action on the part of the Purchaser  and its board of directors;  and
this  Agreement  constitutes  the legal,  valid and  binding  obligation  of the
Purchaser,  enforceable  against the Purchaser in accordance with its terms. The
Purchaser  Shares to be issued to the Selling  Shareholders  at the Closing have
been duly  authorized for issuance and, when issued in accordance with the terms
of this Agreement, will be fully paid and non-assessable.

         3.4 1933 Act.  Purchaser is  acquiring  the Shares for its own account,
not as nominee or agent, for investment and not with a view to, or the resale in
connection  with, any distribution or public offering thereof within the meaning
of the 1933 Act.

4.       COVENANTS OF THE PARTIES.

         4.1  Filings  and  Consents.  Purchaser,   NovelTech  and  the  Selling
Shareholders  shall  ensure  that each  filing or notice  required to be made or
given  (pursuant to any  applicable  Legal  Requirement,  Order or Contract,  or
otherwise) by them in  connection  with the execution and delivery of any of the
Transactional  Agreements or in connection with the  consummation or performance
of any of the Transactions (including each of the filings and notices identified
in the NovelTech Disclosure Schedule) is made or given as soon as possible after
the date of this Agreement.

         4.2      Noncompetition Agreement.

                  (a) Each Selling Shareholder has agreed pursuant to and to the
extent  permitted by Section 16601 of the Business and  Professions  Code of the
State of California and any corresponding  provision of the laws of the State of
Michigan  not to compete  with  NovelTech  or Purchaser in the manner and to the
extent  herein  set  forth.  Each  Selling  Shareholder  is  entering  into this
Agreement as an inducement to Purchaser to consummate the Transactions, with all
of the attendant financial benefits to the Selling  Shareholders as shareholders
of NovelTech.  The Selling Shareholders  understand that where reference is made
to a "Selling  Shareholder"  below,  such reference is to obligate not only each
Selling Shareholder, but also his assigns and successors.

                  (b) Acknowledgements by the Selling Shareholders.  The Selling
Shareholders acknowledge that, by virtue of their position as the sole founders,
shareholders  and  employees  of  NovelTech,  they have  developed  considerable
expertise in the  technology  and business  operations of NovelTech and have had
access to extensive  confidential  information  with respect to  NovelTech.  The
Selling Shareholders  recognize that Purchaser would be irreparably damaged, and
its  substantial  investment in NovelTech  materially  impaired,  if the Selling
Shareholders were to enter into an activity competing with NovelTech's  business
in violation of the terms of this Agreement or if the Selling  Shareholders were
to disclose or make unauthorized use of any confidential  information concerning
the  business of  NovelTech.  Accordingly,  the Selling  Shareholders  expressly
acknowledge that they

                                       15




are  voluntarily  entering into this Agreement and that the terms and conditions
of this  Agreement are fair and  reasonable to the Selling  Shareholders  in all
respects.

                  (c) Confidentiality. The Selling Shareholders hereby expressly
agree that any and all  Proprietary  Assets,  Patents and Trade Secrets that the
Selling  Shareholders  came  to know  as a  result  of  their  positions  as the
founders,  sole  shareholders  and employees of NovelTech  shall remain strictly
confidential and shall not be revealed,  except under order of a court of law of
the United  States of  America.  To the extent  that any such  material  becomes
generally known or is already  generally known to the public through no fault or
action on the part of the Selling  Shareholders,  the Selling Shareholders shall
be relieved of the obligation to maintain its confidentiality.

                  (d)  Non-competition.  Until  the  later of (i) two (2)  years
after the Closing or (ii) termination of a Selling Shareholder's employment with
the  Purchaser or NovelTech,  such Selling  Shareholder  shall not,  directly or
indirectly,  without the prior written  consent of Purchaser,  (A) own,  manage,
operate,  join,  control,  finance or participate in the ownership,  management,
operation,  control or financing of any  business or  enterprise  engaged in any
business  which is  competitive  with the business of  NovelTech  or  Purchaser,
within each of the geographical  units which are listed in Exhibit G hereto (the
"Territory"),  or (B) engage in any other manner,  within the Territory,  in any
business that is  competitive  with the business of NovelTech or Purchaser.  For
the purposes of this Section 4.2, the "business of NovelTech or Purchaser" shall
be defined as the design,  development,  manufacture  and sale of life sciences,
biological and pharmaceutical laboratory equipment and supplies.

                  (e) Non-interference.  Each Selling Shareholder further agrees
that until five (5) years following completion of the Transactions, he will not,
without the prior written consent of Purchaser,  (i) interfere with the business
of NovelTech or Purchaser,  by soliciting,  attempting to solicit,  inducing, or
otherwise  causing any  employee or  consultant  of  NovelTech  or  Purchaser to
terminate  his or her  employment  as such  in  order  to  become  an  employee,
consultant or  independent  contractor to or for any  competitor of NovelTech or
Purchaser  or to or for any  company  with  which  the  Selling  Shareholder  is
associated  in any way;  or (ii)  induce or  attempt  to induce  any  customers,
suppliers,  distributors,  resellers,  or independent contractor of NovelTech or
Purchaser to terminate its  relationship  with, or to take any action that would
be disadvantageous to the business of, NovelTech or Purchaser.

                  (f)  Equitable  Relief.  Each  Selling  Shareholder  expressly
acknowledges that damages alone will not be an adequate remedy for any breach by
a Selling Shareholder of the ovenants set forth in this Section 4.2 and that the
other  parties  hereto,  in addition to any other  remedies  that they may have,
shall be  entitled,  as a matter  of  right,  to  injunctive  relief,  including
specific performance, in any court of competent jurisdiction with respect to any
actual or threatened breach by the Selling Shareholder of any of said covenants.

                  (g)  Severability,  etc. For the purposes of this Section 4.2:
(i) if any  provision  of this  Agreement  shall be held by a court of competent
jurisdiction  to be excessively  broad as to duration,  activity or subject,  it
shall be deemed  to  extend

                                       16



only  over the  maximum  duration,  activity  and/or  subject  as to which  such
provision shall be valid and enforceable under applicable law. If any provisions
shall,  for any  reason,  be held by a court  of  competent  jurisdiction  to be
invalid,   illegal   or   unenforceable,    such   invalidity,   illegality   or
unenforceability  shall not affect any other  provision of this  Agreement,  but
this Agreement shall be construed as if such invalid,  illegal or  unenforceable
provision had never been contained herein;  and (ii) the parties intend that the
covenant  contained  in this  Section  4.2  shall be  construed  as a series  of
separate  covenants,  one for  each  geographical  unit  specified.  Except  for
geographical coverage,  each such separate covenant shall be deemed identical in
terms to the  covenant  contained  in this  Section  4.2.  If,  in any  judicial
proceeding, a court shall refuse to enforce any of the separate covenants deemed
included in this  Agreement,  then the  unenforceable  covenant  shall be deemed
eliminated  from these  provisions  for the purpose of those  proceedings to the
extent necessary to permit the remaining separate covenants to be enforced.

         4.3      General Release.

                  (a)  Effective at Closing (as defined in the  Agreement),  the
Selling  Shareholders  hereby  release,  hold  harmless  and  forever  discharge
NovelTech, its agents, employees, stockholders, officers, directors, affiliates,
subsidiaries and related companies  (including  Purchaser following the Closing)
and their respective  heirs,  personal  representatives,  successors and assigns
(the "Releasees"),  of and from any and all actions,  causes of action,  claims,
demands,  costs,  liabilities,  losses,  and expenses,  past, present or future,
known or unknown,  which it ever had, now has or may have arising from  actions,
omissions,  circumstances  or  conditions  that existed prior to the Closing and
relating to their ownership of or transactions with NovelTech, including without
limitation any actions, causes of action, claims,  demands, costs,  liabilities,
losses and expenses arising from or in any way related to the their ownership of
NovelTech  and/or its holding of  securities  of NovelTech  (but  excluding  any
claims arising  directly from this Agreement or the  Transactions  and claims by
the Selling  Shareholders  for indemnity  pursuant to  NovelTech's  Bylaws) (the
"Released  Claims").  This  release is binding on the Selling  Shareholders  and
their  agents,  employees,   stockholders,   officers,  directors,   affiliates,
subsidiaries  and  related  companies  and  their  respective  heirs,   personal
representatives, successors and assigns (the "Releasors").

                  (b) The Selling Shareholders hereby declare and represent that
in making  this  release  they  understand  and agree that they rely wholly upon
their own judgment,  belief and knowledge of the nature,  extent and duration of
said  Released  Claims  and that they  have not been  influenced  to any  extent
whatsoever in making this release by any representations or statements regarding
said Released Claims,  or regarding any other matters,  made by the Releasees or
by any person or persons representing any of them.

                  (c)  The  Selling  Shareholders   acknowledge  that  they  are
familiar  with the  provisions  of  California  Civil Code Section  1542,  which
provides as follows:

                  A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE CREDITOR
                  DOES NOT KNOW OR  SUSPECT TO EXIST IN HIS FAVOR AT THE TIME OF
                  EXECUTING  THE  RELEASE,  WHICH  IF  KNOWN  BY HIM


                                       17



                  MUST  HAVE MATERIALLY AFFECTED HIS SETTLEMENT WITH THE DEBTOR.

The Selling  Shareholders,  being  aware of said  Section,  and having  received
advice of independent  counsel,  hereby expressly waive any rights the Releasors
may  have  thereunder,  as well as  under  any  other  statutes  or  common  law
principles  of similar  effect  (whether  pursuant  to the laws of the States of
Michigan or California or otherwise),  with respect to the Released Claims.  The
Selling  Shareholders further acknowledge that they may hereafter discover facts
different  from,  or in addition  to, those which it now knows or believes to be
true with respect to the Released  Claims,  and agree that, in such event,  this
release shall  nevertheless be and remain effective in all respects with respect
to the Released Claims,  notwithstanding  such different or additional facts, or
the discovery thereof.

                  (d) The Selling Shareholders  represent and warrant that there
has been no assignment or other transfer of any interest in any Released  Claim,
and that they have read this release, are aware of its contents and legal effect
and have had the  opportunity  to  consult  with  counsel of their  choice  with
respect to this release.

                  (e) The Selling Shareholders  covenant that they will not sue,
sue further,  or otherwise  prosecute any of the  Releasees  with respect to any
claim included within this release.

                  (f) Subject to the  provisions of paragraph  (c), this release
shall be construed in accordance with, and enforced pursuant to, the laws of the
State  of  California,  except  that  this  release  shall  be  given a fair and
reasonable  construction  in  accordance  with the  intention of the parties and
without regard to, or aid of, Section 1654 of the California Civil Code.

         4.4  Cooperation   with   Termination  of  Pension  Plan.  The  Selling
Shareholders  agree to the termination of the existing Pension Plan of NovelTech
as  soon  as  is  practicable   after  Closing  and  to  provide  the  necessary
cooperation,  including but not limited to,  executing any requested  documents,
for termination of the Pension Plan.

         4.5      Registration of Shares.

                  (a) The Purchaser  will use its best efforts to file and cause
a registration  statement on Form S-3 to be declared effective by the Securities
and  Exchange  Commission  (the  "SEC") on or before  March 1, 1997,  covering a
number  of  shares  equal to the  greater  of  thirty-two  percent  (32%) of the
Purchaser  Shares or Shares having an aggregate value of $500,000 at the time of
filing  of said  registration  statement,  and the  Selling  Shareholders  shall
provide all necessary  information and otherwise cooperate with the Purchaser in
this  endeavor.  To the best  Knowledge  of  Purchaser,  there is no reason  why
Purchaser should not be eligible to use Form S-3 commencing December 12, 1996.

                  (b)  If  the  Purchaser  files  with  the  SEC a  registration
statement for registration of its own shares in an underwritten  public offering
on or before June 7, 1998,  Purchaser shall use commercially  reasonable efforts
to register the


                                       18



outstanding Purchaser Shares held by the Selling Shareholders  concurrently with
such  registration.  The  foregoing  shall  depend on the  Selling  Shareholders
executing the required  underwriting  agreement and market conditions permitting
resale of the Purchaser  Shares in addition to the shares to be  registered  for
the account of the Company

5.       MISCELLANEOUS PROVISIONS.

         5.1      Survival of Representations and Covenants; Indemnification.

                  (a) The representations, warranties, covenants and obligations
of  each  party,  including  each  statement  made in  each  party's  respective
disclosure schedules, shall survive any investigation made by any Person and the
Closing and the sale of the Shares to the Purchaser.

                  (b)  Subject  to the  notice  and cure  provisions  of Section
1.2(b) above,  Purchaser shall be entitled to set off against the portion of the
purchase  price  payable on the Second  Payment  Date any and all  amounts  that
Purchaser  is  obligated  to pay and any and all losses  resulting  from (i) any
breaches   by   NovelTech   or  the  Selling   Shareholders   of  any  of  their
representations  and warranties or covenants  made herein,  (ii) excess fees and
expenses of the Selling Shareholders  contemplated by Section 5.3 below or (iii)
the indemnification provisions set forth below.

                  (c) The Selling Shareholders shall hold harmless and indemnify
the Purchaser from and against, and shall compensate and reimburse the Purchaser
for, any Damages  which are directly or  indirectly  suffered or incurred by the
Purchaser or to which the  Purchaser may  otherwise  become  subject at any time
(regardless of whether or not such Damages relate to any third-party  claim) and
which arise directly or indirectly from or as a direct or indirect result of, or
are  directly or  indirectly  connected  with any claim by, or any  Liability to
which  Purchaser or NovelTech may become subject with respect to, any current or
former employee, consultant or agent of NovelTech that would constitute a breach
of Section 2.6(e) above,  even if such claim or Liability or the  possibility of
such claim or Liability  was brought to  Purchaser's  attention in the NovelTech
Disclosure Schedule.

                  (d) The Selling  Shareholders  acknowledge  and agree that, if
NovelTech  becomes  subject to any claim or Liability of the type referred to in
Section  5.1(c),  then the  Purchaser  itself shall be deemed,  by virtue of its
ownership of common stock of NovelTech,  to have incurred Damages as a result of
such claim or Liability.

                  (e) The Selling Shareholders shall not be required to make any
indemnification pursuant to Section 5.1(c): (i) for Damages which aggregate more
than the sum of (A) the  amount of the  payment to be made to them  pursuant  to
Section  1.2(b) on the  Second  Payment  Date (but only  until  such  payment is
required to be made, and thereafter  this clause (A) shall be  disregarded)  and
(B) the fair market value of the balance of the Purchaser Shares held by them at
the time of the claim for  indemnification  under this  Section  5.1;  provided,
however,   that  the   Selling   Shareholders   shall  be   obligated   to  make
indemnification  for up to such amounts and the Purchaser is provided a right of
offset with respect to the cash portion under  Section  5.1(a) above and a right
to place a stop transfer on said balance of the


                                       19




Purchaser  Shares or (ii) if the matters  giving rise to the claim or  Liability
occur or are  discovered  after June 7, 1998 or Purchaser  fails to give Selling
Shareholder  written  notice of such claim or  Liability  on or prior to June 7,
1998.

                  (f) The Selling  Shareholders waive, and acknowledge and agree
that such Selling  Shareholders  shall not have and shall not exercise or assert
or  attempt  to  exercise  or  assert,  any  right of  contribution  or right of
indemnity or any other right or remedy against  NovelTech in connection with any
indemnification  obligation  or  any  other  Liability  to  which  such  Selling
Shareholders  may become  subject under any of the  Transactional  Agreements or
otherwise in connection with any of the Transactions.

                  (g) In the  event  of the  assertion  or  commencement  by any
Person of any claim or Proceeding (whether against NovelTech,  against Purchaser
or against any other Person) with respect to which the Selling  Shareholders may
become  obligated to  indemnify,  hold  harmless,  compensate  or reimburse  the
Purchaser  pursuant to Section 5.1(c),  the Selling  Shareholders shall have the
right,  at their  election to assume the defense of such claim or  Proceeding at
their sole expense.  If the Selling  Shareholders so elect to assume the defense
of any such claim or Proceeding:

                             (i)    the  Selling  Shareholders shall  proceed to
         defend such claim or Proceeding in a diligent manner;

                             (ii)   the Purchaser shall  make  available  to the
         Selling Shareholders any non-privileged  documents and materials in the
         possession  of  Purchaser  that may be necessary to the defense of such
         claim or Proceeding;

                             (iii)  the   Selling   Shareholders   shall    keep
         Purchaser informed of all material developments and  events relating to
         such claim or Proceeding;

                             (iv)   the  Purchaser  shall  have   the  right  to
         participate  in the defense of such claim or  Proceeding   at  its  own
         expense; and

                             (v) the Selling Shareholders may settle,  adjust or
         compromise  such claim or Proceeding  without the prior written consent
         of the Purchaser;  provided, however, that such settlement,  adjustment
         or compromise involves only the payment of money damages.

         5.2 Further Assurances. Each party hereto shall execute and/or cause to
be delivered to each other party hereto such  instruments  and other  documents,
and shall take such other actions,  as such other party may  reasonably  request
(prior  to,  at or  after  the  Closing)  for the  purpose  of  carrying  out or
evidencing any of the Transactions.

         5.3 Fees and Expenses.  The Selling Shareholders shall bear and pay all
fees,  costs and  expenses  (including  all legal fees and  expenses  payable to
Seyburn,  Kahn, Ginn, Bess, Deitch & Serlin) in excess of $25,000 that have been
incurred after May 20, 1996 or that are in the future  incurred by, on behalf of
or for the benefit of NovelTech or Selling  Shareholder  in connection  with the
negotiation,  preparation 


                                       20


and review of any term sheet, agreement, schedule, certificate, opinion, filing,
notice,  consent or similar document  relating to any of the Transactions or the
consummation  and performance of the  Transactions.  NovelTech shall not bear or
pay, and the Selling Shareholders shall not permit NovelTech to bear or pay, any
such fees,  costs or expenses in excess of  $25,000.  Any excess  amount paid or
payable by NovelTech in violation hereof shall be set off against the portion of
the purchase  price  payable on the Second  Payment Date pursuant to Section 5.1
above.

         5.4  Attorneys'  Fees.  If any legal  action or other legal  proceeding
relating  to any of  the  Transactional  Agreements  or the  enforcement  of any
provision of any of the  Transactional  Agreements is brought  against any party
hereto, the prevailing party shall be entitled to recover reasonable  attorneys'
fees,  costs and  disbursements  (in  addition to any other  relief to which the
prevailing party may be entitled).

         5.5 Notices. Any notice or other communication required or permitted to
be delivered to any party under this Agreement  shall be in writing and shall be
deemed  properly  delivered,  given and received  when  delivered  (by hand,  by
registered mail, by courier or express delivery service or by telecopier) to the
address or telecopier  number set forth beneath the name of such party below (or
to such other address or telecopier number as such party shall have specified in
a written notice given to the other parties hereto):

                  if to Selling Shareholders:

                  Brad Neagle
                  5068 Plymouth Road
                  Ann Arbor, MI 48105

                  Kirk Schroeder
                  1692 Miller
                  Ann Arbor, MI 48103


                  with a copy to:

                  Seyburn, Kahn, Ginn, Bess, Deitch & Serlin
                  Suite 1500
                  2000 Town Center
                  Southfield, MI 48075-1185
                  Attn:  Kenneth Morgan






                                       21




                  if to the Purchaser:

                  Molecular Devices Corporation
                  1311 Orleans Drive
                  Sunnyvale, CA 94089
                  Attn: James Iuliano and Andrew Galligan

                  with a copy to:

                  Cooley Godward Castro Huddleson & Tatum
                  5 Palo Alto Square
                  Palo Alto, CA  94306
                  Attn: Andrei M. Manoliu

Addresses may be changed by providing written notice to the other parties.

         5.6 Headings.  The bolded headings  contained in this Agreement are for
convenience  of  reference  only,  shall  not be  deemed  to be a part  of  this
Agreement and shall not be referred to in connection  with the  construction  or
interpretation of this Agreement.

         5.7   Counterparts.   This   Agreement   may  be  executed  in  several
counterparts,  each of which shall constitute an original and all of which, when
taken together, shall constitute one agreement.

         5.8   Governing  Law. This  Agreement  shall be construed in accordance
with, and governed in  all  respects  by,  the  internal  laws  of  the State of
California (without giving effect to principles of conflicts of laws).

         5.9   Successors  and Assigns. This  Agreement  shall be binding  upon:
NovelTech and its successors and assigns (if any); the Selling Shareholders, and
their  successors and assigns (if any); and the Purchaser and its successors and
assigns (if any). This Agreement shall inure to the benefit of:  NovelTech;  the
Selling Shareholders;  the Purchaser;  and the respective successors and assigns
(if any) of the foregoing. After Closing, the Purchaser may freely assign any or
all of its rights under this Agreement, in whole or in part, to any other Person
without  obtaining  the consent or approval of any other party  hereto or of any
other Person.

         5.10  Remedies  Cumulative.  The rights  and  remedies  of the  parties
hereto  shall be  cumulative  (and not alternative).

         5.11  Waiver.  No  failure on the part of any  Person to  exercise  any
power, right, privilege or remedy under this Agreement, and no delay on the part
of any Person in  exercising  any power,  right,  privilege or remedy under this
Agreement,  shall operate as a waiver of such power, right, privilege or remedy;
and no single or partial exercise of any such power, right,  privilege or remedy
shall  preclude  any other or further  exercise  thereof or of any other  power,
right,  privilege or remedy.  No Person shall be deemed to have waived any claim
arising out of this Agreement,  or any power,  right,  privilege or remedy under
this  Agreement,  unless the waiver of such claim,  power,  right,  privilege or
remedy  is  expressly  set  forth in a  written


                                       22




instrument  duly executed and  delivered on behalf of such Person;  and any such
waiver  shall  not be  applicable  or have any  effect  except  in the  specific
instance in which it is given.

         5.12 Amendments.  This Agreement may not be amended,  modified, altered
or  supplemented  other than by means of a written  instrument duly executed and
delivered on behalf of the Purchaser and the Selling Shareholders.

         5.13  Severability.  In the event that any provision of this Agreement,
or the application of any such provision to any Person or set of  circumstances,
shall be  determined  to be  invalid,  unlawful,  void or  unenforceable  to any
extent,  the remainder of this Agreement,  and the application of such provision
to Persons or circumstances  other than those as to which it is determined to be
invalid,  unlawful,  void or  unenforceable,  shall not be impaired or otherwise
affected and shall  continue to be valid and  enforceable  to the fullest extent
permitted by law.

         5.14  Parties in  Interest.  Except for the  provisions  of Section 5.9
hereof,  none of the  provisions  of this  Agreement  is intended to provide any
rights or  remedies  to any  Person  other  than the  parties  hereto  and their
respective permitted successors and assigns (if any).

         5.15  Entire  Agreement.  The  Transactional  Agreements  set forth the
entire  understanding  of the parties relating to the subject matter thereof and
supersede all prior  agreements and  understandings  among or between any of the
parties relating to the subject matter thereof.

         5.16 Construction. For purposes of this Agreement, whenever the context
requires:  the singular  number shall  include the plural,  and vice versa;  the
masculine  gender shall  include the feminine and neuter  genders;  the feminine
gender shall  include the masculine  and neuter  genders;  and the neuter gender
shall include the masculine and feminine genders.  The parties hereto agree that
any rule of  construction  to the effect  that  ambiguities  are to be  resolved
against  the  drafting  party  shall  not  be  applied  in the  construction  or
interpretation of this Agreement. As used in this Agreement, the words "include"
and  "including,"  and  variations  thereof,  shall not be deemed to be terms of
limitation,  but rather  shall be deemed to be  followed  by the words  "without
limitation" whether or not in fact so followed.  Except as otherwise  indicated,
all  references in this  Agreement to "Sections"  and "Exhibits" are intended to
refer to Sections of this  Agreement and Exhibits and other  attachments to this
Agreement.


                                       23





         The  parties  hereto  have caused  this  Agreement  to be executed  and
delivered as of the date first written above.


"PURCHASER":                        MOLECULAR DEVICES CORPORATION
                                      a Delaware corporation


                                    By:_________________________________________

                                    Its:________________________________________



"NOVELTECH":                        NOVELTECH SYSTEMS, INC.,
                                      a Michigan corporation


                                    By:_________________________________________

                                    Its:________________________________________



"SELLING SHAREHOLDERS":


                                    ____________________________________________
                                    Brad Neagle, an Individual



                                    ____________________________________________
                                    Kirk Schroeder, an Individual


                                       24





                                    EXHIBIT A

                               CERTAIN DEFINITIONS

         For purposes of the Agreement (including this Exhibit A):

         Breach.  There  shall be deemed to be a "breach"  of a  representation,
warranty,  covenant,  obligation or other  provision if there is or has been (a)
any  inaccuracy in or breach of, or any failure to comply with or perform,  such
representation,  warranty,  covenant,  obligation or other provision, or (b) any
claim (by any  Person)  or other  circumstance  that is  inconsistent  with such
representation,  warranty, covenant, obligation or other provision; and the term
"breach" shall be deemed to refer to any such inaccuracy, breach, failure, claim
or circumstance.

         CERCLA.  "CERCLA" shall mean the Comprehensive Environmental  Response,
Compensation and Liability Act.

         Code.  "Code" shall mean the Internal Revenue Code of 1986, as amended.

         Comparable Entities. "Comparable Entities" shall mean  Entities  (other
than  NovelTech) that are engaged in businesses similar to NovelTech's business.

         Consent.  "Consent"  shall  mean  any  approval, consent, ratification,
permission, waiver or  authorization (including any Governmental Authorization).

         Contract.  "Contract"  shall mean any written,  oral,  implied or other
agreement,  contract,  understanding,  arrangement,  instrument, note, guaranty,
indemnity,  representation,  warranty,  deed,  assignment,  power  of  attorney,
certificate,  purchase  order,  work  order,  insurance  policy,  benefit  plan,
commitment, covenant, assurance or undertaking of any nature.

         Current  Benefit Plan.  "Current  Benefit Plan" shall mean any Employee
Benefit Plan that is currently in effect and that was  established or adopted by
NovelTech  or is  maintained  or  sponsored  by  NovelTech;  in which  NovelTech
participates;  and with  respect to which  NovelTech  is or may be  required  or
permitted to make any contribution.

         Damages.  "Damages" shall include any loss, damage,  injury, decline in
value, lost opportunity,  Liability, claim, demand, settlement, judgment, award,
fine, penalty,  Tax, fee (including any legal fee, expert fee, accounting fee or
advisory fee), charge,  cost (including any cost of investigation) or expense of
any nature.

         Employee Benefit Plan.  "Employee Benefit Plan"  shall have the meaning
specified in Section 3(3) of ERISA.

         Encumbrance.  "Encumbrance" shall mean any lien, pledge, hypothecation,
charge,  mortgage,  security interest,  encumbrance,  equity,  trust,  equitable
interest,  claim,  preference,  right of possession,  lease,  tenancy,  license,
encroachment, covenant, infringement,  interference, Order, proxy, option, right
of first refusal,

                                       25




preemptive right,  community property  interest,  legend (other than such legend
required by state or federal  securities laws with reference to the registration
of  such  shares),  defect,  impediment,  exception,  reservation,   limitation,
impairment,  imperfection  of title,  condition  or  restriction  of any  nature
(including any restriction on the voting of any security, any restriction on the
transfer of any asset, any restriction on the receipt of any income derived from
any asset,  any  restriction on the use of any asset and any  restriction on the
possession,  exercise or transfer of any other  attribute  of  ownership  of any
asset. For purposes of this definition, "asset" shall exclude securities.).

         Entity.  "Entity" shall mean any corporation  (including any non-profit
corporation),   general  partnership,  limited  partnership,  limited  liability
partnership,  joint venture, estate, trust,  cooperative,  foundation,  society,
political party,  union,  company  (including any limited  liability  company or
joint stock company),  firm or other  enterprise,  association,  organization or
entity.

         ERISA.  "ERISA" shall mean the Employee Retirement Income Security  Act
of 1974, as amended.

         Excluded  Contract.   "Excluded  Contract"  shall  mean  any  NovelTech
Contract  that:  NovelTech has entered into in the Ordinary  Course of Business;
does not  contemplate  or involve the transfer or licensing of any  intellectual
property  right;  has a term of  less  than  90  days  or may be  terminated  by
NovelTech  (without  penalty) within 90 days after the delivery of a termination
notice by NovelTech;  and does not contemplate or involve the payment of cash or
other consideration in an amount or having a value in excess of $10,000.

         GAAP. "GAAP"  shall  mean  generally  accepted  accounting  principles,
applied on a basis consistent with  the  basis  on which the NovelTech Financial
 Statements were prepared.

         Governmental  Authorization.  "Governmental  Authorization"  shall mean
any: (i) permit, license, certificate, franchise, concession, approval, consent,
ratification,   permission,   clearance,   confirmation,   endorsement,  waiver,
certification, designation, rating, registration, qualification or authorization
that is, has been or may in the future be issued,  granted,  given or  otherwise
made available by or under the authority of any Governmental Body or pursuant to
any Legal  Requirement;  or (ii) right under any Contract with any  Governmental
Body.

         Governmental Body.  "Governmental Body" shall mean any:

                  (a) nation,  principality,   state,  commonwealth,   province,
         territory, county, municipality,  district
         or other jurisdiction of any nature;

                  (b) federal,   state,  local,  municipal,   foreign  or  other
         government;

                  (c) governmental or quasi-governmental authority of any nature
         (including any governmental division, subdivision,  department, agency,
         bureau, branch, office,  commission,  council, board,  instrumentality,
         officer, official,  representative,  organization, unit, body or Entity
         and any court or other tribunal);


                                       26




                  (d) multi-national organization or body; or

                  (e) individual,  Entity or  body  exercising,  or  entitled to
         exercise,  any  executive,   legislative,   judicial,   administrative,
         regulatory,  police,  military  or  taxing  authority  or  power of any
         nature.

         Hazardous Material.  "Hazardous Material" shall include:

                  (a) any  petroleum,  waste  oil,  crude  oil,  asbestos,  urea
         formaldehyde or polychlorinated biphenyl;

                  (b) any  waste,  gas  or  other  substance or material that is
         explosive or radioactive;

                  (c) any  "hazardous  substance,"  "pollutant,"  "contaminant,"
         "hazardous  waste,"  "regulated  substance,"  "hazardous  chemical"  or
         "toxic chemical" as designated, listed or defined (whether expressly or
         by  reference) in any statute,  regulation  or other Legal  Requirement
         (including CERCLA, the Resource  Conservation Recovery Act, the Federal
         Water  Pollution  Control  Act, the Toxic  Substances  Control Act, the
         Emergency  Planning and Community  Right-to-Know Act and the respective
         regulations promulgated thereunder); and

                  (d) any  compound,   mixture,   solution,   product  or  other
         substance or material that contains any substance or material  referred
         to in clause "(a)", "(b)", "(c)" or "(d)" above.

         Knowledge.  An  individual  shall  be  deemed to  have "Knowledge" of a
particular fact or other matter if:

                  (a) such individual  is  actually  aware of such fact or other
         matter; or

                  (b) a prudent  individual  could be  expected  to  discover or
         otherwise  become  aware of such fact or other  matter in the course of
         conducting a reasonably diligent investigation  concerning the truth or
         existence of such fact or other matter.

NovelTech  shall be deemed to have  "Knowledge"  of a  particular  fact or other
matter if any officer of NovelTech or either or both of the Selling Shareholders
has Knowledge of such fact or other matter.

         Legal Requirement.  "Legal Requirement" shall mean any federal,  state,
local,  municipal,  foreign or other law,  statute,  legislation,  constitution,
principle  of  common  law,   resolution,   ordinance,   code,  edict,   decree,
proclamation,   treaty,   convention,   rule,  regulation,   ruling,  directive,
pronouncement,  requirement, specification,  determination, decision, opinion or
interpretation that is or has been issued, enacted,  adopted,  passed, approved,
promulgated,  made,  implemented  or  otherwise  put into effect by or under the
authority of any Governmental Body.


                                       27



         Liability.  "Liability"  shall  mean  any  debt,  obligation,  duty  or
liability  of  any  nature  (including  any  unknown,  undisclosed,   unmatured,
unaccrued, unasserted,  contingent,  indirect, conditional,  implied, vicarious,
derivative,  joint, several or secondary liability and with the exception of any
Liability  created by any Legal  Requirement),  regardless of whether such debt,
obligation,  duty or  liability  would be required to be  disclosed on a balance
sheet prepared in accordance with generally accepted  accounting  principles and
regardless of whether such debt,  obligation,  duty or liability is  immediately
due and payable.  Without  reducing the generality of the  foregoing,  Liability
shall also include any and all liabilities for Taxes.

         NovelTech Contract.  "NovelTech Contract" shall mean any Contract:

                  (a) to which NovelTech is a party;

                  (b) by which  NovelTech  or any of its assets is or may become
         bound or under which  NovelTech  has,  or  may  become  subject to, any
         obligation; or

                  (c) under  which  NovelTech  has  or  may acquire any right or
         interest.

         NovelTech  Disclosure Schedule.  "NovelTech  Disclosure Schedule" shall
mean the  schedule  (dated  as of the date of the  Agreement)  delivered  to the
Purchaser on behalf of NovelTech and each Selling  Shareholder,  a copy of which
is attached to the Agreement and incorporated in the Agreement by reference.

         NovelTech  Financial Statements. "NovelTech Financial  Statements" shal
have the meaning specified in Section 2.4(a) of the Agreement.

         NovelTech Plan.  "NovelTech Plan" shall  mean  any Current Benefit Plan
or Past Benefit Plan.

         Order.  "Order" shall mean any:

                  (a)  order,  judgment,   injunction,  edict,  decree,  ruling,
         pronouncement,  determination,  decision,  opinion, verdict,  sentence,
         subpoena,  writ or award  that  is,  has been  issued,  made,  entered,
         rendered or otherwise  put into effect by or under the authority of any
         court,   administrative  agency  or  other  Governmental  Body  or  any
         arbitrator or arbitration panel; or

                  (b)  Contract with any  Governmental  Body that is or has been
         entered into in  connection  with any Proceeding.

         Ordinary  Course  of  Business.  An  action  taken by or on  behalf  of
NovelTech  shall not be deemed to have  been  taken in the  "Ordinary  Course of
Business" unless:

                  (a)  such  action  is recurring in nature,  is consistent with
         NovelTech's  past  practices  and  is  taken  in the ordinary course of
         NovelTech's normal day-to-day operations;


                                       28




                  (b)  such action is taken in accordance with sound and prudent
         business practices;

                  (c)  such  action  is  not  required  to  be   authorized   by
         NovelTech's  shareholders,   NovelTech's  board  of  directors  or  any
         committee of  NovelTech's  board of directors  and does not require any
         other separate or special authorization of any nature;

                  (d) such action is similar in nature and  magnitude to actions
         customarily taken,  without any separate or special  authorization,  in
         the  ordinary  course  of the  normal  day-to-day  operations  of other
         Entities  that  are  engaged  in  businesses   similar  to  NovelTech's
         business; and

                  (e)  notwithstanding  the foregoing,  no  transaction  between
         NovelTech and the Selling Shareholders, or either of them, which is not
         listed on the Schedule of Intercompany  Transfers,  shall be considered
         as having occurred in the "Ordinary Course of Business."

         Past Benefit Plan.  "Past Benefit Plan" shall mean any Employee Benefit
Plan (other than a Current Benefit Plan):

                  (a) that has at any time been established, adopted, maintained
         or sponsored by NovelTech;

                  (b) in which NovelTech has ever participated; or

                  (c) with respect to which NovelTech has ever made, or has ever
         been required or permitted to make, any contribution.

         Pension Plan.  "Pension Plan" shall mean that certain NovelTech Systems
Inc.  Employee  Pension Plan dated March 12, 1996.

         Person.  "Person" shall mean  any  individual,  Entity  or Governmental
 Body.

         Proceeding.  "Proceeding"  shall  mean any  action,  suit,  litigation,
arbitration,   proceeding  (including  any  civil,   criminal,   administrative,
investigative or appellate proceeding and any informal proceeding), prosecution,
contest, hearing, inquiry, inquest, audit, examination or investigation that is,
has been or may in the future be  commenced,  brought,  conducted or heard by or
before, or that otherwise has involved or may involve,  any Governmental Body or
any arbitrator or arbitration panel.

         Proprietary Asset.  "Proprietary  Asset" shall mean any patent,  patent
application,  trademark  (whether  registered or unregistered and whether or not
relating to a published work),  trademark  application,  trade name,  fictitious
business name, service mark (whether  registered or unregistered),  service mark
application,   copyright   (whether   registered  or  unregistered),   copyright
application,  maskwork, maskwork application, trade secret, know-how, franchise,
system, computer software,  invention,  design, blueprint,  proprietary product,
technology, proprietary right or other intellectual property right or intangible
asset.

                                       29





         Related Party.  Each of the following shall be deemed to be a  "Related
Party":

                  (a) Mr. Brad Neagle;

                  (b) Mr. Kirk Schroeder;

                  (c) each  individual  who  is, or who has at any time been, an
         officer or director of NovelTech;

                  (d) each  member  of  the  family  of each of the  individuals
         referred to in clauses  "(a),"  "(b)" and "(c)" above; and

                  (e) any Entity (other than  NovelTech) in which any one of the
         individuals  referred to in clauses "(a)",  "(b)" and "(c)" above holds
         (or in which  more  than one of such  individuals  collectively  hold),
         beneficially  or otherwise,  a material  voting,  proprietary or equity
         interest.

         Representatives.  "Representatives"  shall  mean  officers,  directors,
employees,  agents, attorneys,  accountants,  advisors and representatives.  The
Selling  Shareholders  and all  other  Related  Parties  shall be  deemed  to be
"Representatives" of NovelTech

         Tax. "Tax" shall mean any tax (including any income tax, franchise tax,
capital gains tax,  estimated tax, gross receipts tax,  value-added tax, surtax,
excise  tax,  ad valorem  tax,  transfer  tax,  stamp tax,  sales tax,  use tax,
property tax,  business tax,  occupation  tax,  inventory  tax,  occupancy  tax,
withholding tax or payroll tax), levy, assessment,  tariff, impost,  imposition,
toll,  duty  (including  any customs  duty),  deficiency or fee, and any related
charge or amount (including any fine, penalty or interest), that is, has been or
may in the  future  be (a)  imposed,  assessed  or  collected  by or  under  the
authority of any  Governmental  Body, or (b) payable pursuant to any tax-sharing
agreement or similar Contract.

         Tax  Return.   "Tax  Return"  shall  mean  any  return  (including  any
information return), report, statement, declaration, estimate, schedule, notice,
notification,  form, election, certificate or other document or information that
is, has been or may in the future be filed with or submitted  to, or required to
be filed with or submitted  to, any  Governmental  Body in  connection  with the
determination,  assessment,  collection  or payment of any Tax or in  connection
with the administration, implementation or enforcement of or compliance with any
Legal Requirement relating to any Tax.

         Technology Transfer. "Technology Transfer" shall mean that at least one
Fluorescent Imaging Plate Reader (the "FLIPR") has been built and is operational
at the Purchaser facility at Sunnyvale, California, and that Purchaser personnel
(other than Kirk  Schroeder  and Brad Neagle) have been  provided  with adequate
materials,  design,  vendor,  software  code,  and  all  other  information  and
licenses, to enable technical personnel reasonably skilled in the field to build
the current design FLIPR at the Purchaser's  Sunnyvale  facility without the aid
of Kirk Schroeder and/or Brad Neagle.


                                       30




         Transactional Agreements.  "Transactional Agreements" shall mean:

                  (a)  the Agreement;

                  (b)  the closing certificate; and

                  (c)  the Employment Agreements.

         Transactions.  "Transactions" shall mean (a) the execution and delivery
of the  respective  Transactional  Agreements,  and (b) all of the  transactions
contemplated by the respective Transactional Agreements, including:

                  (i)  the sale of the Shares by the Selling Shareholders to th
         Purchaser  in  accordance  with the  Agreement; and

                  (ii) the  performance by NovelTech,  the Selling  Shareholders
         and  the   Purchaser  of  their   respective   obligations   under  the
         Transactional  Agreements  and the exercise by  NovelTech,  the Selling
         Shareholders  and the  Purchaser of their  respective  rights under the
         Transactional Agreements.





                                       31