THERMO ELECTRON CORPORATION

                             EXECUTIVE SEVERANCE AGREEMENT


     THIS  AGREEMENT  by and between  THERMO  ELECTRON  CORPORATION,  a Delaware
corporation (the "Company"),  and Brian D. Holt (the  "Executive") is made as of
January 27, 2000 (the "Effective Date").

     WHEREAS,  the Company recognizes that the uncertainty  regarding the future
employment   prospects  for  key  personnel  may  result  in  the  departure  or
distraction   of  key  personnel  to  the  detriment  of  the  Company  and  its
stockholders;

     WHEREAS, the Board of Directors of the Company (the "Board") has determined
that appropriate  steps should be taken to reinforce and encourage the continued
employment  and  dedication of the Company's key personnel  without  distraction
from such uncertainty and related events and circumstances; and

     NOW, THEREFORE,  as an inducement for and in consideration of the Executive
remaining in its employ, the Company agrees that the Executive shall receive the
severance  benefits  set forth in this  Agreement  in the event the  Executive's
employment  with the Company is  terminated  under the  circumstances  described
below.

        1.     Key Definitions.

     As used herein,  the following  terms shall have the  following  respective
meanings:

     1.1 "Change in Control"  means an event or occurrence  set forth in any one
or more of subsections  (a) through (d) below  (including an event or occurrence
that  constitutes  a Change  in  Control  under one of such  subsections  but is
specifically exempted from another such subsection):

     (a) the  acquisition by an individual,  entity or group (within the meaning
of Section  13(d)(3) or  14(d)(2) of the  Securities  Exchange  Act of 1934,  as
amended  (the  "Exchange  Act")) (a  "Person")  of  beneficial  ownership of any
capital  stock  of  the  Company  if,  after  such   acquisition,   such  Person
beneficially  owns  (within  the  meaning  of Rule 13d-3  promulgated  under the
Exchange  Act) 40% or more of either (i) the  then-outstanding  shares of common
stock of the  Company  (the  "Outstanding  Company  Common  Stock")  or (ii) the
combined voting power of the then-outstanding securities of the Company entitled
to vote generally in the election of directors (the "Outstanding  Company Voting
Securities");  provided,  however, that for purposes of this subsection (a), the
following  acquisitions  shall  not  constitute  a Change  in  Control:  (i) any
acquisition by the Company,  (ii) any  acquisition by any employee  benefit plan
(or related  trust)  sponsored or maintained  by the Company or any  corporation
controlled by the Company, or (iii) any acquisition by any corporation  pursuant
to a transaction  which  complies with clauses (i) and (ii) of subsection (c) of
this Section 1.1; or

     (b)  such  time as the  Continuing  Directors  (as  defined  below)  do not
constitute a majority of the Board (or, if applicable, the Board of Directors of
a successor  corporation to the Company),  where the term "Continuing  Director"
means at any date a member of the Board (i) who was a member of the Board on the
date of the  execution of this  Agreement  or (ii) who was  nominated or elected
subsequent  to such  date by at  least a  majority  of the  directors  who  were
Continuing  Directors  at the  time of such  nomination  or  election  or  whose
election to the Board was  recommended or endorsed by at least a majority of the
directors  who  were  Continuing  Directors  at the time of such  nomination  or
election;  provided, however, that there shall be excluded from this clause (ii)
any  individual  whose initial  assumption of office  occurred as a result of an
actual or threatened election contest with respect to the election or removal of
directors or other actual or threatened  solicitation of proxies or consents, by
or on behalf of a person other than the Board; or

     (c)  the   consummation   of  a  merger,   consolidation,   reorganization,
recapitalization  or statutory share exchange involving the Company or a sale or
other  disposition of all or  substantially  all of the assets of the Company in
one or a series of transactions (a "Business Combination"),  unless, immediately
following  such Business  Combination,  each of the following two  conditions is
satisfied: (i) all or substantially all of the individuals and entities who were
the beneficial  owners of the  Outstanding  Company Common Stock and Outstanding
Company  Voting  Securities  immediately  prior  to  such  Business  Combination
beneficially own, directly or indirectly,  more than 60% of the then-outstanding
shares of common  stock and the combined  voting  power of the  then-outstanding
securities   entitled  to  vote   generally  in  the   election  of   directors,
respectively,  of the  resulting  or  acquiring  corporation  in  such  Business
Combination (which shall include,  without limitation,  a corporation which as a
result  of  such  transaction  owns  the  Company  or  substantially  all of the
Company's  assets  either  directly or through one or more  subsidiaries)  (such
resulting  or  acquiring  corporation  is referred  to herein as the  "Acquiring
Corporation")  in  substantially   the  same  proportions  as  their  ownership,
immediately  prior to such  Business  Combination,  of the  Outstanding  Company
Common Stock and Outstanding Company Voting Securities,  respectively;  and (ii)
no Person (excluding the Acquiring  Corporation or any employee benefit plan (or
related  trust)  maintained  or  sponsored  by the  Company or by the  Acquiring
Corporation) beneficially owns, directly or indirectly,  40% or more of the then
outstanding  shares  of common  stock of the  Acquiring  Corporation,  or of the
combined  voting power of the  then-outstanding  securities of such  corporation
entitled to vote generally in the election of directors; or

     (d) approval by the  stockholders of the Company of a complete  liquidation
or dissolution of the Company.

     1.2 "Cause" means the Executive's  willful engagement in illegal conduct or
gross misconduct which is materially and demonstrably  injurious to the Company.
For  purposes of this  Section  1.2,  no act or failure to act by the  Executive
shall be considered  "willful"  unless it is done, or omitted to be done, in bad
faith and without  reasonable belief that the Executive's action or omission was
in the best interests of the Company.

     2. Term of Agreement. This Agreement, and all rights and obligations of the
parties  hereunder,  shall take effect upon the Effective  Date and shall expire
upon the first to occur of (a) the  expiration of the Term (as defined below) or
(b) the  fulfillment by the Company of all of its  obligations  under Sections 4
and 5.2 if the Executive's  employment with the Company  terminates prior to the
expiration  of the Term.  "Term"  shall  mean the  period  commencing  as of the
Effective Date and continuing in effect through December 31, 2002.

     3.  Not an  Employment  Contract.  The  Executive  acknowledges  that  this
Agreement  does not constitute a contract of employment or impose on the Company
any  obligation to retain the  Executive as an employee and that this  Agreement
does not prevent the Executive from terminating employment at any time.

        4.     Benefits to Executive.

               4.1    Compensation.

     (a)  Termination  Without Cause.  If the  Executive's  employment  with the
Company is terminated  by the Company  (other than for Cause) then the Executive
shall be entitled to the following benefits:

     (i) the Company  shall pay to the Executive in a lump sum in cash within 30
days after the date of termination the aggregate of the following amounts:

     (1) the sum of (A) two  times  the  Executive's  annual  base  salary as in
effect  immediately prior to the date of termination,  and (B) the amount of any
cash  compensation  previously  deferred  by the  Executive  (together  with any
accrued interest or earnings thereon) and any accrued vacation pay, in each case
to the extent not previously paid; and

     (ii) for two years after the date of termination,  or such longer period as
may be  provided  by the terms of the  appropriate  plan,  program,  practice or
policy,  the Company shall continue to provide benefits to the Executive and the
Executive's  family at least equal to those  which  would have been  provided to
them if the Executive's  employment had not been terminated,  in accordance with
the applicable  benefit plans in effect on the date of  termination  or, if more
favorable to the Executive and the Executive's  family,  in effect  generally at
any time thereafter with respect to other peer executives of the Company and its
affiliated  companies;   provided,   however,  that  if  the  Executive  becomes
reemployed with another employer and is eligible to receive a particular type of
benefits (e.g.,  health insurance benefits) from such employer on terms at least
as favorable to the Executive and the Executive's family as those being provided
by the Company,  then the Company  shall no longer be required to provide  those
particular benefits to the Executive and the Executive's family;

     (iii) to the extent not  previously  paid or  provided,  the Company  shall
timely pay or provide to the Executive any other amounts or benefits required to
be paid or provided or which the Executive is eligible to receive  following the
Executive's termination of employment under any plan, program, policy, practice,
contract or agreement of the Company and its  affiliated  companies  (such other
amounts and benefits shall be hereinafter  referred to as the "Other Benefits");
and

     (iv)  for  purposes  of  determining  eligibility  (but  not  the  time  of
commencement  of benefits) of the  Executive  for retiree  benefits to which the
Executive  is entitled,  the  Executive  shall be  considered  to have  remained
employed by the Company until two years after the date of termination.

     (b)  Termination  for Cause.  If the  Company  terminates  the  Executive's
employment  with the  Company  for  Cause,  then the  Company  shall (i) pay the
Executive,  in a lump sum in cash within 30 days after the date of  termination,
the sum of (A) the  Executive's  base salary through the date of termination and
(B) the amount of any cash compensation previously deferred by the Executive, in
each case to the extent not  previously  paid and (ii)  timely pay or provide to
the Executive the Other Benefits.

     4.2 Mitigation.  The Executive shall not be required to mitigate the amount
of any  payment or  benefits  provided  for in this  Section 4 by seeking  other
employment or otherwise.  Further, except as provided in Section 4.1(a)(ii), the
amount of any payment or benefits  provided  for in this  Section 4 shall not be
reduced by any compensation earned by the Executive as a result of employment by
another employer,  by retirement benefits,  by offset against any amount claimed
to be owed by the Executive to the Company or otherwise.

        5.     Disputes.

     5.1  Settlement of Disputes;  Arbitration.  All claims by the Executive for
benefits under this  Agreement  shall be directed to and determined by the Board
of Directors of the Company and shall be in writing.  Any denial by the Board of
Directors of a claim for benefits under this Agreement shall be delivered to the
Executive in writing and shall set forth the specific reasons for the denial and
the specific  provisions of this  Agreement  relied upon. The Board of Directors
shall  afford a  reasonable  opportunity  to the  Executive  for a review of the
decision denying a claim. Any further dispute or controversy arising under or in
connection  with this Agreement  shall be settled  exclusively by arbitration in
Boston, Massachusetts,  in accordance with the rules of the American Arbitration
Association then in effect. Judgment may be entered on the arbitrator's award in
any court having jurisdiction.

     5.2  Expenses.  The Company  agrees to pay as incurred,  to the full extent
permitted by law, all legal,  accounting  and other fees and expenses  which the
Executive may reasonably  incur as a result of any claim or contest  (regardless
of the outcome  thereof) by the Company,  the Executive or others  regarding the
validity  or  enforceability  of, or  liability  under,  any  provision  of this
Agreement or any guarantee of performance  thereof (including as a result of any
contest  by the  Executive  regarding  the  amount of any  payment  or  benefits
pursuant to this  Agreement),  plus in each case interest on any delayed payment
at the  applicable  Federal rate  provided for in Section  7872(f)(2)(A)  of the
Internal Revenue Code.

        6.     Successors.

     6.1 Successor to Company.  The Company shall require any successor (whether
direct or indirect, by purchase,  merger,  consolidation or otherwise) to all or
substantially  all of the business or assets of the Company  expressly to assume
and agree to perform this Agreement to the same extent that the Company would be
required to perform it if no such  succession  had taken place.  As used in this
Agreement,  "Company"  shall mean the Company as defined above and any successor
to its business or assets as aforesaid  which assumes and agrees to perform this
Agreement, by operation of law or otherwise.

     6.2 Successor to Executive.  This  Agreement  shall inure to the benefit of
and be  enforceable  by  the  Executive's  personal  or  legal  representatives,
executors,   administrators,   successors,  heirs,  distributees,  devisees  and
legatees. If the Executive should die while any amount would still be payable to
the Executive or the Executive's family hereunder if the Executive had continued
to live, all such amounts,  unless otherwise  provided herein,  shall be paid in
accordance  with  the  terms  of  this  Agreement  to  the  executors,  personal
representatives or administrators of the Executive's estate.

     7.  Notice.  All  notices,  instructions  and  other  communications  given
hereunder  or in  connection  herewith  shall be in  writing.  Any such  notice,
instruction or communication shall be sent either (i) by registered or certified
mail, return receipt requested, postage prepaid, or (ii) prepaid via a reputable
nationwide  overnight courier service, in each case addressed to the Company, at
81 Wyman Street, Waltham,  Massachusetts and to the Executive at the Executive's
principal  residence as currently reflected on the Company's records (or to such
other address as either the Company or the  Executive may have  furnished to the
other in  writing in  accordance  herewith).  Any such  notice,  instruction  or
communication shall be deemed to have been delivered five business days after it
is sent by registered  or certified  mail,  return  receipt  requested,  postage
prepaid,  or one  business  day  after  it is sent  via a  reputable  nationwide
overnight  courier  service.  Either party may give any notice,  instruction  or
other  communication  hereunder  using  any  other  means,  but no such  notice,
instruction or other  communication  shall be deemed to have been duly delivered
unless and until it actually is received by the party for whom it is intended.

        8.     Miscellaneous.

     8.1 Severability.  The invalidity or  unenforceability  of any provision of
this  Agreement  shall not affect the  validity or  enforceability  of any other
provision of this Agreement, which shall remain in full force and effect.

     8.2 Injunctive  Relief. The Company and the Executive agree that any breach
of this  Agreement by the Company is likely to cause the  Executive  substantial
and  irrevocable  damage  and  therefore,  in the event of any such  breach,  in
addition to such other remedies which may be available, the Executive shall have
the right to specific performance and injunctive relief.

     8.3  Governing  Law.  The  validity,   interpretation,   construction   and
performance  of this  Agreement  shall be governed by the  internal  laws of the
Commonwealth of Massachusetts, without regard to conflicts of law principles.

     8.4  Waivers.  No waiver by the  Executive at any time of any breach of, or
compliance  with, any provision of this Agreement to be performed by the Company
shall be deemed a waiver of that or any other provision at any subsequent time.

     8.5 Counterparts.  This Agreement may be executed in counterparts,  each of
which  shall be  deemed  to be an  original  but both of  which  together  shall
constitute one and the same instrument.

     8.6 Tax Withholding.  Any payments provided for hereunder shall be paid net
of any applicable tax withholding required under federal, state or local law.

     8.7 Entire Agreement. This Agreement sets forth the entire agreement of the
parties hereto in respect of the subject matter  contained herein and supersedes
all  prior  agreements,  promises,  covenants,   arrangements,   communications,
representations or warranties, whether oral or written, by any officer, employee
or representative of any party hereto in respect of the subject matter contained
herein,  and any prior agreement of the parties hereto in respect of the subject
matter contained herein is hereby  terminated and cancelled,  except as provided
in the next sentence.  Notwithstanding the foregoing sentence,  if the Executive
is party to an agreement with the Company  providing for the payment of benefits
in the event  employment is  terminated  after a Change in Control (a "Change in
Control Agreement"), such Change in Control Agreement shall not be terminated or
cance lled by this Agreement and such Change in Control  Agreement shall survive
and  remain  in  effect  in  accordance  with its own  terms.  In the  event the
Executive actually receives benefits under the Change in Control Agreement,  the
Executive shall not also be entitled to receive benefits under this Agreement.

     8.8 Amendments. This Agreement may be amended or modified only by a written
instrument executed by both the Company and the Executive.

     IN WITNESS  WHEREOF,  the parties hereto have executed this Agreement as of
the day and year first set forth above.


                                            THERMO ELECTRON CORPORATION

By:________________________________
Anne Pol
Senior Vice President, Human Resources

EXECUTIVE:


___________________________________
                                    Brian D. Holt






HOLT EXEC SEV AGMT [2] 1/27/00
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