INDEMNIFICATION ESCROW AGREEMENT


         THIS  INDEMNIFICATION  ESCROW AGREEMENT ("Escrow Agreement") is entered
into effective as of May 17, 1999 ("Effective Date"), by and among (i) MOLECULAR
DEVICES  CORPORATION.,  a corporation  organized and existing  under the laws of
State of Delaware, United States of America ("Purchaser");  (ii) HELGE SKARE AND
WIEL SKARE  individuals  and residents of Norway  (collectively,  the "Principal
Stockholders");  and (iii)  GREATER BAY TRUST  COMPANY  ("Escrow  Agent"),  with
reference to the following facts:

                                    RECITALS

         A. The Purchaser and the Selling Stockholders have entered into a Stock
and Asset  Purchase  Agreement and related  agreements  dated as of May 17, 1999
(collectively, the "Stock and Asset Purchase Agreement"),  pursuant to which the
Purchaser has agreed to purchase from the Selling Stockholders,  and the Selling
Stockholders have agreed to sell, convey, transfer,  assign and deliver, 314,400
shares of the capital  stock of Skatron  Instruments  AS, a  Norwegian  company,
representing one hundred percent (100%) of the issued and outstanding  shares of
capital stock of that company.

         B.  Pursuant  to  Section  1.2(c)  of  the  Stock  and  Asset  Purchase
Agreement,  the  Purchaser has agreed to deposit with the Escrow Agent an amount
(the "Escrow Amount"), to be held and applied by the Escrow Agent as provided in
this Escrow  Agreement,  equal to Six Hundred  Thousand  United  States  Dollars
(US$600,000).

         C. The parties desire that the Escrow Amount shall be held in escrow by
the Escrow Agent and  distributed  in  accordance  with the  provisions  of this
Escrow Agreement and the Stock and Asset Purchase Agreement.

                                    AGREEMENT

         NOW,  THEREFORE,  in  consideration  of the foregoing  premises and the
representations,  warranties and covenants and agreements  contained herein, and
for other good and valuable consideration,  the receipt and adequacy of which is
hereby acknowledged, the parties hereto agree as follows:

1.       DEFINITIONS

         Capitalized  terms used in this  Escrow  Agreement  without  definition
shall have the respective meanings given to them in the Stock and Asset Purchase
Agreement.

2.       APPOINTMENT OF THE ESCROW AGENT

         The Purchaser and the Principal  Stockholders hereby appoint the Escrow
Agent as escrow agent  hereunder on the terms and  conditions  set forth herein,
and  the  Escrow  Agent  hereby  accepts  such  appointment  on such  terms  and
conditions.

3.       ESTABLISHMENT OF ESCROW

         3.1 Deposit of Escrow  Amount.  Pursuant to Section 1.2(c) of the Stock
and Asset Purchase Agreement, the Purchaser is depositing the Escrow Amount with
the Escrow Agent in immediately available funds. The Escrow Agent shall maintain
the Escrow Amount, as it may be reduced from time to

                                       1.


time in accordance with the terms of this Agreement, in an account maintained by
it (the "Escrow Account") until disbursed by the Escrow Agent in accordance with
the terms of this Agreement.

         3.2 Acceptance of Appointment. The Escrow Agent hereby agrees to act as
escrow agent and to hold,  safeguard and disburse the Escrow Amount  pursuant to
the terms and conditions hereof.

4.       INVESTMENT OF FUNDS

         Except as the Purchaser and the Principal Stockholders may from time to
time jointly  instruct the Escrow Agent in writing,  the Escrow  Amount shall be
invested  from time to time,  to the extent  possible,  in an  interest  bearing
investment  account  approved by the Purchasers  and the Principal  Stockholders
with the Escrow  Agent,  until  disbursement  of the entire Escrow  Amount.  The
Escrow  Agent is  authorized  to  liquidate  in  accordance  with its  customary
procedures any portion of the Escrow Amount consisting of investments to provide
for payments required to be made under this Escrow Agreement. All profit derived
from any investment of any part of the Escrow Amount, together with all interest
earned on the Escrow Amount, shall be included within the definition of the term
"Escrow Amount" for purposes of this Escrow Agreement.

5.       RETENTION OF ESCROW AMOUNT

         The Escrow  Agent shall hold the Escrow  Amount in escrow to secure the
obligations  of the  Principal  Stockholders  set  forth in the  Stock and Asset
Purchase  Agreement and shall release the Escrow  Amount,  and any part thereof,
only in accordance with the provisions of this Escrow Agreement.

6.       NOTICE  AND  PAYMENT  OF CLAIMS:  RETENTION  AND  RELEASE OF AMOUNTS IN
         ESCROW

         6.1 Purchaser's Notice. At any time during the period commencing on the
date hereof and ending six (6) months  thereafter (the "Holdback  Period"),  the
Purchasers  may  deliver  a notice  signed by an  officer  of the  Purchaser  (a
"Notice") to the  Principal  Stockholders  and the Escrow Agent (i) stating that
the  Principal  Stockholders  are  obligated to make a payment to the  Purchaser
pursuant to Section 5 of the Stock and Asset  Purchase  Agreement  in respect of
any loss,  damage,  deficiency,  liability  or  obligation  included  within the
definition  of "Damages" or otherwise  the subject of Section 5 of the Stock and
Asset Purchase  Agreement  (each, a "Damage"),  and  identifying  which of those
Sections gives rise to the Principal Stockholders'  obligation;  (ii) specifying
in  reasonable  detail the  nature,  the  underlying  facts,  and, to the extent
determinable  at the time of such  Notice,  the  dollar  amount or a good  faith
approximation thereof;  together with the Purchaser's  calculations with respect
thereto (a "Claim Amount") of any claim for  indemnification  (a "Claim") it may
have  under  Section  5 of the Stock and  Asset  Purchase  Agreement;  and (iii)
confirming  that such Claim is not subject to the  limitations  on the Principal
Stockholders'  indemnification obligations set forth in Section 5.3 of the Stock
and Asset Purchase  Agreement.  The Purchasers may make more than one claim with
respect to any underlying state of facts, but shall only be entitled to a single
recovery  in  respect  of any single  Damage or amount  which is the  subject of
Section 5 of the Stock and Asset Purchase Agreement.  The Escrow Agent shall not
inquire into or consider  whether a Claim complies with the  requirements of the
Stock and Asset Purchase Agreement.

         6.2 Principal  Stockholders' Counter Notice. Within ninety (90) days of
receipt of a Notice,  the Principal  Stockholders  may deliver to the Purchasers
and to the Escrow Agent a notice (a "Counter  Notice")  signed by each Principal
Stockholder  delivering such Counter Notice (i) setting forth their acquiescence
to or rejection of the Claim in its totality,  or of their partial acceptance of
the Claim; (ii) specifying that part of the Claim to which  acquiescence is made
and that part  which is  rejected;  (iii) as to each part of the Claim  which is
rejected,  specifying whether the Principal Stockholders reject their

                                       2.


obligation to indemnify the Purchasers in respect thereof, whether the Principal
Stockholders  accept their  obligation  to indemnify  the  Purchasers in respect
thereof but reject the amount of the Claim or both; provided,  however,  that if
the Principal  Stockholders  have waived their right to dispute their obligation
to indemnify the Purchasers in respect of any Claim under the terms of the Stock
and Asset Purchase Agreement,  they shall not have the right to reject any Claim
on the basis of any such asserted  waiver;  and (iv) setting forth in reasonable
detail the nature of and the facts underlying their rejection of any part of the
Claim.

         6.3  Accepted  Claims.  Any Claim or portion of any Claim  which is not
disputed in a Counter  Notice  timely  delivered by the  Principal  Stockholders
shall be referred to as "Accepted." Failure by the Principal Stockholders timely
to deliver a Counter  Notice in response to any Notice  shall be deemed to be an
acceptance of the validity of the Claim set forth in such Notice and a waiver of
any right to contest the validity or amount of such Claim, and the amount of the
entire Claim shall be deemed "Accepted."

         6.4  Unresolved  Claims.  Any  Claim  or  portion  of a Claim  which is
disputed in a Counter  Notice  shall be resolved in  accordance  with Section 7,
and, pending such resolution,  shall be referred to as "Unresolved."  The entire
amount of any Claim shall be deemed "Unresolved"  between the date of the Notice
setting  forth  such  Claim,  and (i) the  date on  which a  Counter  Notice  is
delivered  in respect of such  Claim,  and (ii) the last date on which a Counter
Notice may be delivered in respect of such Claim under Section 6.2, whichever is
earlier.

         6.5 Retention of Escrow Amount. Except as set forth in Section 6.6, the
Escrow Agent shall retain a portion of the Escrow  Amount  sufficient to pay the
amount of all Unresolved Claims.

         6.6 Release of Escrow Amounts.  The Escrow Agent shall:  (i) pay to the
Purchasers,  on the  ninety-fifth  (95th) day after  receipt of any Notice,  the
Accepted  amount of the Claim set forth in such Notice;  (ii) make such payments
to the Purchasers or the Principal Stockholders as required under Section 7; and
(iii) release to the Principal  Stockholders  at the termination of the Holdback
Period the  Escrow  Amount,  if any,  in excess of the  aggregate  amount of any
Claims which are then Unresolved.

7.       UNRESOLVED CLAIMS

         The Escrow  Agent  shall not pay any amounts in respect of any Claim or
portion thereof which is Unresolved except in accordance with the following:

         7.1 Joint or Counterpart Instructions for Payment of Unresolved Claims.
If the Purchasers and the Principal  Stockholders  resolve their  differences by
negotiation  as to the  portion  of any Claim  which is  Unresolved,  they shall
deliver joint or counterpart  instructions to the Escrow Agent setting forth the
agreement  between them.  The Escrow Agent shall be entitled to rely on any such
joint  or  counterpart  instructions  and  shall  promptly  pay  amounts  to the
Purchasers  or to the  Principal  Stockholders  as set  forth  in the  joint  or
counterpart instructions.

         7.2 Arbitral or Judicial Decision with Respect to Unresolved Claims. If
the  Purchasers  and the  Principal  Stockholders  are not able to resolve their
differences  as to the portion of any Claim which is Unresolved  within  fifteen
(15) days of receipt by the  Purchasers of the Counter Notice  identifying  such
Unresolved Claim amount, either of the Purchasers or the Principal  Stockholders
may initiate  arbitration  to resolve  those  differences  under Section 13. The
Escrow Agent shall pay amounts in respect of any such Unresolved Claim only upon
receipt of (i) joint or  counterpart  instructions  setting  forth an  agreement
between  the  Purchasers  and the  Principal  Stockholders  with  respect to the
payment  of such  Unresolved  Claim  or  part  thereof,  or (ii) an  arbitration
decision or a final  non-appealable  judgment or court  order  presented  by the
Purchasers  or  the  Principal   Stockholders   stating  whether  the  Principal

                                       3.


Stockholders  have an obligation to indemnify the  Purchasers and specifying the
dollar  amount of such  indemnity  obligation.  The Escrow Agent shall  promptly
provide written notice to the non-presenting  party of such arbitration decision
or court  judgment or order upon receipt  thereof,  and five (5)  Business  Days
thereafter shall pay amounts to the Purchasers or to the Principal  Stockholders
as set forth in the  arbitration  decision or final  non-appealable  judgment or
court order,  unless otherwise enjoined from so doing. Any arbitration  decision
or court  order  shall be  accompanied  by a legal  opinion by  counsel  for the
presenting  party  satisfactory  to the  Escrow  Agent  to the  effect  that the
arbitration  decision  or order is final and  non-appealable.  The Escrow  Agent
shall act on such  arbitration  decision  or court  order and legal  opinion  as
provided herein without further question.

8.       TERMINATION OF ESCROW

         This Escrow Agreement shall terminate when the entire Escrow Amount has
been distributed in accordance with the provisions of this Escrow Agreement.

9.       DUTIES OF THE ESCROW AGENT

         9.1 The  Escrow  Agent  shall not be under any duty to give the  Escrow
Amount held by it  hereunder  any  greater  degree of care than it gives its own
similar  property  and shall not be required to invest any funds held  hereunder
except as directed in this Escrow  Agreement.  Uninvested  funds held  hereunder
shall not earn or accrue interest.

         9.2 The  Escrow  Agent  shall not be  liable,  except for its own gross
negligence or willful  misconduct  and, except with respect to claims based upon
such gross  negligence  or willful  misconduct  that are  successfully  asserted
against the Escrow Agent,  the other parties  hereto shall jointly and severally
as to 50% each  indemnify  and hold harmless the Escrow Agent (and any successor
to the Escrow Agent) from and against any and all losses,  liabilities,  claims,
actions,  damages  and  expenses,   including  reasonable  attorneys'  fees  and
disbursements,  arising out of and in connection  with this  Agreement.  Without
limiting  the  foregoing,  the  Escrow  Agent  shall in no event  be  liable  in
connection  with its investment or reinvestment of any cash held by it hereunder
in  good  faith,  in  accordance  with  the  terms  hereof,  including,  without
limitation,  any  liability  for  any  delays  (not  resulting  from  its  gross
negligence  or willful  misconduct)  in the  investment or  reinvestment  of the
Escrow Amount, or any loss of interest incident to any such delays.

         9.3 The  Escrow  Agent  shall  be  entitled  to rely  upon  any  order,
judgment,  certification,  demand, notice, instrument or other writing delivered
to it hereunder  without  being  required to determine the  authenticity  or the
correctness  of any fact  stated  therein or the  propriety  or  validity of the
service  thereof.  The Escrow Agent may act in reliance  upon any  instrument or
signature believed by it to be genuine and may assume that the person purporting
to give  receipt or advice or make any  statement  or execute  any  document  in
connection  with the  provisions  hereof has been duly  authorized to do so. The
Escrow Agent may conclusively presume that the undersigned representative of any
party hereto  which is an entity other than a natural  person has full power and
authority to instruct  the Escrow  Agent on behalf of that party unless  written
notice to the contrary is delivered to the Escrow Agent.

         9.4 The Escrow  Agent may act  pursuant  to the advice of counsel  with
respect  to any matter  relating  to t. his  Escrow  Agreement  and shall not be
liable for any action  taken or omitted by it in good faith in  accordance  with
such advice.

         9.5 The Escrow  Agent does not have any  interest in the Escrow  Amount
deposited  hereunder  but is  serving  as escrow  holder  only and  having  only
possession  thereof.  Any  payments  of income from the Escrow  Amount  shall be
subject to withholding  regulations  then in force with respect to United States

                                       4.


Taxes.  The  parties  hereto  will  provide  the Escrow  Agent with  appropriate
Internal Revenue Service Forms W-9 for tax identification  number  certification
or Forms W-8 for foreign status certification.  This Section 9.5 and Section 9.2
shall survive  notwithstanding  any termination of this Escrow  Agreement or the
resignation of the Escrow Agent.

         9.6 The Escrow Agent (and any successor to the Escrow Agent) may at any
time resign as such by  delivering  the Escrow  Amount to any  successor  to the
Escrow Agent jointly  designated by the other parties  hereto in writing,  or to
any court,  whereupon  the Escrow Agent shall be  discharged of and from any and
all  further  obligations  arising  in  connection  with  this  Agreement.   The
resignation  of the  Escrow  Agent  will take  effect on the  earlier of (i) the
appointment  of a successor  escrow  agent (which may include a court of law) or
(ii) the day which is sixty (60) days after the date of  delivery of its written
notice of  resignation to the other parties  hereto.  If at that time the Escrow
Agent has not received a designation  of a successor  escrow  agent,  the Escrow
Agent's sole responsibility after that time shall be to retain and safeguard the
Escrow  Amount until  receipt of a  designation  of successor  escrow agent or a
joint written  disposition  instruction  by the other parties  hereto or a final
non-appealable order of a court of law.

         9.7 In the event of any  disagreement  between the other parties hereto
resulting in adverse claims or demands being made in connection  with the Escrow
Amount,  or any  portion  thereof,  or in the event that the Escrow  Agent is in
doubt as to what  action it should  take  hereunder,  the Escrow  Agent shall be
entitled  to retain  such  portion of the Escrow  Amount  corresponding  to such
adverse  claims or as to which it is in doubt as to what  action it should  take
(the  "Amount  in  Question")  until it has  received  (i) joint or  counterpart
instructions setting forth an agreement between the Purchasers and the Principal
Stockholders with respect to the disposition of the Amount in Question,  or (ii)
an  arbitration  decision  or a final  non-appealable  judgment  or court  order
presented by the  Purchasers  or the  Principal  Stockholders  setting forth the
disposition of the Amount in Question.  The Escrow Agent shall promptly  provide
written notice to the non-presenting  party of any arbitration decision or final
non-appealable  judgment  or court  order  upon  receipt  thereof,  and five (5)
Business Days thereafter shall pay amounts to the Purchasers or to the Principal
Stockholders  as set forth in the arbitration  decision or final  non-appealable
judgment  or  court  order,   unless  otherwise  enjoined  from  so  doing.  Any
arbitration  decision or court order shall be  accompanied by a legal opinion by
counsel for the presenting party  satisfactory to the Escrow Agent to the effect
that the arbitration  decision or order is final and non-appealable.  The Escrow
Agent shall act on such arbitration decision or court order and legal opinion as
provided herein without further question.

         9.8 The Escrow Agent's fees and expenses for acting as the Escrow Agent
hereunder  are set  forth  in  Schedule  A  hereto.  Except  as may be  provided
elsewhere in this Escrow  Agreement,  the Escrow Agent's fees and expenses shall
be shared equally by the Purchasers and the Principal Stockholders.

         9.9  Except as  required  by law,  no  printed  or other  matter in any
language  (including,  without limitation,  prospectuses,  notices,  reports and
promotional  material)  that  mentions  the Escrow  Agent's  name or the rights,
powers,  or  duties of the  Escrow  Agent  shall be issued by the other  parties
hereto or on such parties' behalf unless the Escrow Agent shall first have given
its specific written consent thereto.

10.      LIMITED RESPONSIBILITY

         This Escrow Agreement expressly sets forth all the duties of the Escrow
Agent with respect to any and all matters pertinent hereto. No implied duties or
obligations  shall be read into this Escrow Agreement  against the Escrow Agent.
The Escrow Agent shall not be bound by the provisions of any agreement among the
other parties hereto except this Escrow Agreement.

                                       5.


11.      OWNERSHIP FOR TAX PURPOSES

         The Principal  Stockholders and the Purchasers agree that, for purposes
of any Taxes based on income, the Principal Stockholders shall be treated as the
owner of the Escrow Amount, and that the Principal  Stockholders will report all
income,  if any, that is earned on, or derived from, the Escrow Amount as income
in the taxable year or years in which such income is properly includible and pay
any taxes attributable thereto.

12.      NOTICES

         All notices,  requests, demands or other communications provided herein
shall be made in writing and shall be deemed to have been duly  delivered (i) if
delivered personally  overnight,  including by reputable  international  courier
service  five (5)  Business  Days after  delivery to the courier or, if earlier,
upon delivery  against a signed receipt  therefor or (ii) upon  transmission  by
facsimile  or  telecopier,  which  transmission  is  confirmed,  in either  case
addressed  to the party to be notified at the address set forth below or at such
other  address as such party  shall have  notified  the other Party  hereto,  by
notice given in conformity with this Section 12.

        if to the Purchasers:             Molecular Devices Corporation
                                          1311 Orleans Drive
                                          Sunnyvale, CA 94089
                                          Attn: President
                                          Facsimile: 408-747-3601

        with required copies to:          Cooley Godward llp
                                          Five Palo Alto Square
                                          3000 El Camino Real
                                          Palo Alto, CA  94306-2155
                                          Attention:  Thomas M. Shoesmith
                                          Facsimile: 650-857-0663

        if to the Principal Stockholders: Helge Skare
                                          Weil Skare
                                          Tord Pedersens gt 38
                                          3014 Drammen
                                          Norway

        with required copies to:          Wilson Sonsini Goodrich & Rosati, P.C.
                                          650 Page Mill Road
                                          Palo Alto, CA 94306
                                          Attn: Roger E. George
                                          Facsimile:  650-845-5000

        if to the Escrow Agent:           Greater Bay Trust Company
                                          P.O. Box 1740
                                          Palo Alto, CA 94302
                                          Attn: Anna Paiva
                                          Fax: 650-473-1326

                                       6.


13.      DISPUTE RESOLUTION AND ARBITRATION

         Any  dispute,  controversy  or  claim  between  the  Purchaser  and the
Principal  Stockholders  arising out of or relating to this Escrow  Agreement or
the  performance,  breach or  termination  thereof will be settled in accordance
with the  process  described  in  Sections  6.3 and 6.4 of the  Stock  and Asset
Purchase Agreement.

14.      JURISDICTION; SERVICE OF PROCESS

         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). Subject to the provisions of Section
13, any dispute  between  the parties  connected  with this  Agreement  shall be
submitted  to the sole  jurisdiction  of the courts of the State of  California,
County of Santa Clara, or, if it has or can acquire jurisdiction,  in the United
States  District  Court for the  Northern  District of  California.  Each of the
parties  consent to the  jurisdiction  of such  courts  (and of the  appropriate
appellate  courts) in any such action or proceeding  and waives any objection to
venue  laid  therein.  Process in any action or  proceeding  referred  to in the
preceding sentence may be served on any party anywhere in the world.

15.      COUNTERPARTS

         This Escrow Agreement may be executed in one or more counterparts, each
of  which  will be  deemed  to be an  original  and all of,  which,  when  taken
together, will be deemed to constitute one and the same.

16.      SECTION HEADINGS

         The  headings of sections in this Escrow  Agreement  are  provided  for
convenience only and will not affect its construction or interpretation.

17.      WAIVER

         The rights and remedies of the parties to this Agreement are cumulative
and  not  alternative.  Neither  the  failure  nor any  delay  by any  party  in
exercising any right,  power,  or privilege  under this Escrow  Agreement or the
documents referred to in this Escrow Agreement will operate as a waiver of, such
right, power, or privilege, and no single or partial exercise of any such right,
power,  or privilege will preclude any other or further  exercise of such right,
power, or privilege or the exercise of any other right, power, or privilege.  To
the maximum  extent  permitted by applicable  law, (i) no claim or right arising
out of this  Escrow  Agreement  or the  documents  referred  to in  this  Escrow
Agreement can be  discharged  by one party,  in whole or in part, by a waiver or
renunciation of, the claim or right unless in writing signed by the other party;
(ii) no waiver  that may be given by a party  will be  applicable  except in the
specific instance for which it is given; and (iii) no notice to or demand on one
party  will be deemed to be a waiver of any  obligation  of such party or of the
right of, the party giving such notice or demand to take further  action without
notice or demand as provided in this Escrow Agreement or the documents  referred
to in this Escrow Agreement.

18.      EXCLUSIVE AGREEMENT AND MODIFICATION; NONASSIGNABILITY

         This  Escrow  Agreement,  together  with the Stock  and Asset  Purchase
Agreement, supersedes all prior agreements among the parties with respect to the
subject matter thereof and those agreements constitute (along with the documents
referred to  therein),  a complete and  exclusive  statement of the terms of the
agreement  between the parties with respect to its subject  matter.  This Escrow
Agreement  may not

                                       7.


be  amended  except by a  written  agreement  executed  by the  Purchasers,  the
Principal  Stockholders  and the Escrow Agent.  This Escrow Agreement may not be
assigned by any of the Purchasers or the Principal Stockholders, except by will,
the laws of intestacy, or by other operation of law.

19.      SUCCESSORS AND ASSIGNS

         The provisions of this Escrow Agreement shall be binding upon and inure
to the benefit of the parties and their respective successors and assigns.

         IN WITNESS  WHEREOF,  the parties  have  executed  and  delivered  this
Agreement as of the date first written above.



MOLECULAR DEVICES CORPORATION:               THE PRINCIPAL STOCKHOLDERS:


By:  /s/ Joseph D. Keegan                    By:      /s/Helge Skare
Its:     Chief Executive Officer                 -------------------------------
                                                      Helge Skare


                                             By:      /s/Wiel Skare
                                                 -------------------------------
                                                      Wiel Skare


ESCROW AGENT:

Greater Bay Trust Co.



By:  /s/Anna Paiva
   ------------------------------------
Its: Vice President and Trust Officer


              [SIGNATURE PAGE TO INDEMNIFICATION ESCROW AGREEMENT]

                                       8.


                                  SCHEDULE "A"


                        Schedule of Fees of Escrow Agent


Annual Fee:                         $2,500.00


Fee per disbursement:               $   25.00


Note:  additional  fees may be required in the event of unusual  occurrences  or
requests for assistance on the part of Greater Bay Trust Company.

                                       9.