UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 20549

              ----------------------------------------------------

                                    FORM 11-K

                                  ANNUAL REPORT
                        PURSUANT TO SECTION 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


(mark one)
[ X ] ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE
      ACT OF 1934 For the fiscal year ended December 31, 2002

                                       OR

[   ] TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE
      ACT OF 1934

                          Commission file number 1-8002

      A. Full title of the plan and address of the plan, if different from that
         of the issuer named below:

         Thermo Electron Corporation Choice Plan

      B. Name of issuer of the securities held pursuant to the plan and the
         address of the principal executive office:

         Thermo Electron Corporation
         81 Wyman Street
         Waltham, Massachusetts 02454-9046




Thermo Electron Corporation Choice Plan
--------------------------------------------------------------------------------

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the trustees (or other persons who administer the employee benefit plan) have
duly caused this annual report to be signed by the undersigned hereunto duly
authorized.

               THERMO ELECTRON CORPORATTION CHOICE PLAN

               By:  Thermo Electron Corporation, Pension Committee


               By:  /s/ Theo Melas-Kyriazi
                    ------------------------------------------------------------
                    Theo Melas-Kyriazi
                    Chief Financial Officer and Member of the Plan Administrator

Date:  June 25, 2003




                    THERMO ELECTRON CORPORATION CHOICE PLAN

                              FINANCIAL STATEMENTS
                                       AND
                            SUPPLEMENTARY INFORMATION

                 FOR THE YEARS ENDED DECEMBER 31, 2002 AND 2001

                                       WITH

                       REPORTS OF INDEPENDENT ACCOUNTANTS




Thermo Electron Corporation Choice Plan
Table of Contents
--------------------------------------------------------------------------------

                                                                            Page

Reports of Independent Accountants                                           1-2

Financial Statements:

     Statements of Net Assets Available for Benefits                          3

     Statement of Changes in Net Assets Available for Benefits                4

     Notes to Financial Statements                                           5-7

Supplementary Information:

     Schedule of Assets Held (at End of Year)                                 8

Exhibit Index                                                                 9








Thermo Electron Corporation Choice Plan
Report of Independent Accountants
--------------------------------------------------------------------------------

To the Participants, Administrator and Pension Committee of
Thermo Electron Corporation Choice Plan

In our opinion, the accompanying statements of net assets available for benefits
and the related statement of changes in net assets available for benefits
present fairly, in all material respects, the net assets available for benefits
of Thermo Electron Corporation Choice Plan (the "Plan") at December 31, 2002,
and the changes in net assets available for benefits for the year ended December
31, 2002 in conformity with accounting principles generally accepted in the
United States of America. These financial statements are the responsibility of
the Plan's management; our responsibility is to express an opinion on these
financial statements based on our audit. We conducted our audit of these
statements in accordance with auditing standards generally accepted in the
United States of America, which require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements, assessing
the accounting principles used and significant estimate made by management, and
evaluating the overall financial statement presentation. We believe that our
audit provides a reasonable basis for our opinion. The financial statements of
the Plan as of December 31, 2001 and for the year then ended were audited by
other independent accountants whose report dated June 27, 2002 expressed an
unqualified opinion on those statements.

Our audit was conducted for the purpose of forming an opinion on the basic
financial statements taken as a whole. The supplemental schedule is presented
for the purpose of additional analysis and is not a required part of the basic
financial statements but is supplementary information required by the Department
of Labor's Rules and Regulations for Reporting and Disclosure under the Employee
Retirement Income Security Act of 1974. This supplemental schedule is the
responsibility of the Plan's management. The supplemental schedule has been
subjected to the auditing procedures applied in the audit of the basic financial
statements and in our opinion, is fairly stated in all material respects in
relation to the basic financial statements taken as a whole.



PricewaterhouseCoopers LLP

Boston, Massachusetts
June 16, 2003

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Thermo Electron Corporation Choice Plan
Report of Independent Accountants
--------------------------------------------------------------------------------

To the Pension Committee of
Thermo Electron Corporation Choice Plan
Waltham, Massachusetts


We have audited the accompanying statement of net assets available for benefits
of the Thermo Electron Corporation Choice Plan (the Plan) as of December 31,
2001. This financial statement is the responsibility of the Plan's management.
Our responsibility is to express an opinion on this financial statement based on
our audit.

We conducted our audit in accordance with auditing standards generally accepted
in the United States of America. Those standards require that we plan and
perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. An audit also includes assessing the accounting principles used and
significant estimates made by the Plan's management, as well as evaluating the
overall financial statement presentation. We believe that our audit provides a
reasonable basis for our opinion.

In our opinion, the financial statement referred to above present fairly, in all
material respects, the net assets available for benefits of the Plan as of
December 31, 2001 in conformity with accounting principles generally accepted in
the United States of America.



CARLIN, CHARRON, & ROSEN LLP


Worcester, Massachusetts
June 27, 2002




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Thermo Electron Corporation Choice Plan
Statements of Net Assets Available for Benefits
December 31, 2002 and 2001
--------------------------------------------------------------------------------


                                                                                                                        


                                                                                                        2002                 2001
                                                                                                ------------         ------------

Assets
  Cash and cash equivalents                                                                     $    565,679         $    762,879
  Investments, at fair value                                                                     333,208,996          281,948,235
  Employer Security Thermo Electron Corporation                                                   11,861,344           15,216,739
  Loans to participants                                                                            5,976,961            4,569,758
                                                                                                ------------         ------------

                                                                                                 351,612,980          302,497,611
                                                                                                ------------         ------------

  Receivables:
     Employer contributions                                                                          546,587              674,807
     Participant contributions                                                                     1,082,122              901,560
     Other                                                                                             5,616                    -
                                                                                                ------------         ------------

                                                                                                   1,634,325            1,576,367
                                                                                                ------------         ------------

        Total assets                                                                             353,247,305          304,073,978
                                                                                                ------------         ------------

Liabilities
  Operating payables                                                                                   3,469                    -
                                                                                                ------------         ------------

        Net assets available for benefits                                                       $353,243,836         $304,073,978
                                                                                                ============         ============



                                         See accompanying notes to financial statements.

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Thermo Electron Corporation Choice Plan
Statement of Changes in Net Assets Available for Benefits
For the Year Ended December 31, 2002
-------------------------------------------------------------------------------------------------------------------------------



                                                                                                                         



                                                                                                                           2002
                                                                                                                   ------------

     Addition to net assets attributed to investment income
        Interest and dividends                                                                                     $  7,424,061
                                                                                                                   ------------

           Total investment income                                                                                    7,424,061
                                                                                                                   ------------

     Contributions:
        Employers                                                                                                     9,165,350
        Participants                                                                                                 19,368,208
                                                                                                                   ------------

                                                                                                                     28,533,558
                                                                                                                   ------------

  Deductions from net assets attributed to:
     Benefits paid to participants                                                                                   34,930,220
     Administrative expenses                                                                                             30,128
     Net depreciation in fair value of investments                                                                   49,911,891
                                                                                                                   ------------

           Total deductions                                                                                          84,872,239
                                                                                                                   ------------

  Net decrease before transfer from other plans                                                                      48,914,620
                                                                                                                   ------------

  Net transfers to this plan                                                                                         98,084,478
                                                                                                                   ------------

  Net increase in net assets available for benefits                                                                  49,169,858

  Net assets available for benefits:
     Beginning of year                                                                                              304,073,978
                                                                                                                   ------------

     End of year                                                                                                   $353,243,836
                                                                                                                   ============


                                          See accompanying notes to financial statements.

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Thermo Electron Corporation Choice Plan
Notes to Financial Statements
For the Years Ended December 31, 2002 and 2001
--------------------------------------------------------------------------------

1.       Plan Description

         The following description of the Thermo Electron Corporation Choice
         Plan (the Plan) provides only general information. Participants should
         refer to the Plan agreement for a more complete description of the
         Plan's provisions.

         General
         The Thermo Electron Corporation Choice Plan (the Plan) is a defined
         contribution plan. The Plan covers eligible full-time and part-time
         employees of Thermo Electron Corporation and subsidiaries (the Company)
         who have completed two months of service. The Plan is subject to the
         provisions of the Employee Retirement Income Security Act of 1974
         (ERISA).

         Contributions
         Each year participants may contribute up to 50 percent of pre-tax
         annual compensation or $11,000, as defined in the Plan. Participants
         may also contribute amounts representing distributions from other
         qualified defined benefit or defined contribution plans. Beginning on
         the first day of the calendar quarter following completion of one year
         of service, the Company makes non-discretionary matching contributions
         equal to 200 percent of the first 2 percent and 25 percent of the next
         2 percent of base compensation that a participant contributes to the
         Plan. Participants direct the investment of their contributions and the
         Company match into various investment options offered by the Plan. The
         Plan currently offers the Company's common stock and eighteen
         investment funds as investment options for participants. Contributions
         are subject to certain limitations.

         Participant Accounts
         Each participant's account is credited with the participant's
         contributions and allocations of the Company's contribution and plan
         earnings, and charged with an allocation of administrative expenses.
         Allocations are based on participant earnings or account balances, as
         defined. The benefit to which a participant is entitled is the benefit
         that can be provided from the participant's vested account.

         Vesting
         Participants are immediately vested in their voluntary contributions
         plus actual earning thereon. Vesting in the Company matching
         contributions plus actual earnings thereon is based on years of
         service. A participant is 100 percent vested after three years of
         credited service.

         A participant is automatically 100 percent vested in all contributions
         upon the attainment of age 65, upon becoming permanently disabled, or
         upon death while still an active participant.

         Due to the number of divestitures in 2002 and 2001, the Company may
         have experienced partial terminations. As a result, the Company has
         accelerated the vesting of all contributions for all participants
         involved in the divestitures.

         Participant Loans
         Participants may only borrow from their employee portion of fund
         accounts a minimum of $1,000 up to a maximum equal to $50,000 or 50% of
         the vested account balance, whichever is less. The term of the loan is
         generally five years except when use of the proceeds is for the
         purchase of a primary residence, for which the term can be up to 30
         years. The loans are secured by the balance in the participant's
         account and bear interest at a rate commensurate with local prevailing
         rates as determined by the plan administrator. The interest rates on
         plan loans range from 5.25% to 7% at December 31, 2002. Principal and
         interest are repaid through payroll deductions.

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Thermo Electron Corporation Choice Plan
Notes to Financial Statements
For the Years Ended December 31, 2002 and 2001
--------------------------------------------------------------------------------

         Benefit Payments and Plan Withdrawals
         On termination of service due to death, disability or retirement, a
         participant (or beneficiary) may elect to receive either a lump-sum
         amount equal to the value of the participant's vested interest in his
         or her account or periodic instalments. For termination of service due
         to other reasons, a participant may receive the value of the vested
         interest in his or her account as a lump-sum distribution. Withdrawals
         may be made under certain other circumstances in accordance with the
         Plan document.

         Forfeitures
         Upon a participant's break in service, as defined, the nonvested
         portion of the participant's account is forfeited and is used to reduce
         the Company's future funding requirements. If a participant who has
         terminated employment is rehired by the Company before the greater of a
         five-year break in service or the number of the participant's years of
         service prior to the participant's break in service, the participant
         shall be reinstated in such forfeited amount. In 2002, employer
         contributions were reduced by $240,519 from forfeited nonvested
         accounts.

         Transfer In/Out
         In connection with certain reorganization activities at the Company,
         the assets of certain other plans sponsored by subsidiaries of the
         Company have been transferred into the Choice Plan in connection with
         the termination of those plans. Additionally, the reorganization has
         involved a number of business dispositions. As a result, the plan
         assets in the accounts of the affected employees have sometimes been
         transferred to plans sponsored by the acquirers of these businesses
         disposed. These transfers to and from other plans are captioned "net
         transfers to this plan" in the financial statements.

2.       Summary of Significant Accounting Policies

         Use of Estimates
         The preparation of financial statements in conformity with generally
         accepted accounting principles requires management to make estimates
         and assumptions that affect the reported amounts of plan assets and
         liabilities and changes therein, and disclosure of contingent assets
         and liabilities. Actual results could differ from those estimates.

         Investment Valuation
         Investments are stated at fair value as determined by Fidelity
         Management Trust Company (the "Trust Company"), a trust company that is
         the trustee and custodian of the Plan's investment assets. Common
         shares are valued based on quoted market prices. Registered investment
         companies and bank collective investment funds are valued based on net
         asset value. Participant loans are valued at cost plus accrued
         interest, which approximates fair value.

         Payment of Benefits
         Benefits are recorded when paid.

3.       Tax Status

         The Plan has received a favorable determination letter from the
         Internal Revenue Service dated May 15, 1995. The Plan has been amended
         since that date and a revised application for a determination letter is
         pending approval by the IRS; however, the plan administrator and Plan's
         tax counsel believe the Plan is currently designed and being operated
         in compliance with the applicable requirements of the Internal Revenue
         Code.

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Thermo Electron Corporation Choice Plan
Notes to Financial Statements
For the Years Ended December 31, 2002 and 2001
---------------------------------------------------------------------------------------------------------------------------------

4.       Investments

         Investments that represent five percent or more of the Plan's net assets are as follows:



                                                                                                                        

                                                                                                December 31,         December 31,
                                                                                                        2002                 2001
                                                                                                ------------          -----------

         Managed Income Portfolio II:  Class II                                                 $ 82,028,407          $         -
         Fidelity Equity - Income II Fund                                                         46,954,580           43,815,474
         Fidelity Blue Chip Growth Fund                                                           43,974,327           47,921,091
         Fidelity Balanced Fund                                                                   42,617,193           40,077,454
         Fidelity Magellan Fund                                                                   24,014,123                    -
         Fidelity Growth Company Fund                                                             20,369,301           25,193,042
         U.S. Equity Index Commingled Pool                                                        18,548,584           17,742,087
         PIMCO Total Return Fund:  Class ADM                                                      17,699,913            6,389,802
         Janus Worldwide Fund                                                                     13,749,138           19,271,006
         Thermo Electron Corporation                                                              11,861,344           15,216,739
         Stable Value Fund                                                                                 -           61,893,402

         Purchases and sales of investments are recorded on a trade-date basis.
         Interest income is recorded on the accrual basis. Dividends are
         recorded on ex-dividend date.

5.       Related Party Transactions

         Plan investments are managed by the Trust Company, which is a trustee
         as defined by the Plan. Therefore, these transactions qualify as
         party-in-interest transactions. There were no fees paid by the Plan for
         investment management services for the period ended December 31, 2002.

6.       Plan Termination

         Although it has not expressed an intent to do so, the Company has the
         right under the Plan to discontinue its contributions at any time and
         to terminate the Plan subject to the provisions of ERISA. In the event
         of Plan termination, participants would become 100% vested in their
         employer contributions.

7.       Administrative Expenses

         The Company pays for administrative expenses associated with management
         of and professional services for the Plan. Administrative fees for
         hardship withdrawals and loan transactions are paid by the
         participants. The administrative expenses included in the statement of
         changes in net assets available for benefits represent expenses paid by
         the participants.

8.       Plan Mergers

         On May 31, 2002, the Thermo Neslab, Inc. 401(k) Plan was merged into
         the Plan.  The balance of $14,627,249 for the net assets available for
         benefits as of May 31, 2002 was transferred into the Plan.

         On July 31, 2002, the Thermo Finnigan LLC 401(k) Plan was merged into
         the Plan. The balance of $47,453,179 for the net assets available for
         benefits as of July 31, 2002 was transferred into the Plan.

         As of December 31, 2002, the participant accounts and the net assets of
         the Spectra Physics 401(k) Plan were transferred into the Plan,
         totalling $36,004,050. The financial statements reflect the merger as
         if it occurred at the close of business December 31, 2002.


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Thermo Electron Corporation Choice Plan
Schedule of Assets Held (at End of Year)
December 31, 2002                                                                                           Supplemental Schedule
---------------------------------------------------------------------------------------------------------------------------------

                                                                                                      Units/              Current
                                                                                                      Shares                Value
                                                                                                  ----------         ------------

Description of Investments (1)

Mutual Funds:
  Fidelity Balanced Fund                                                                           3,206,711         $ 42,617,193
  Fidelity Blue Chip Growth Fund                                                                   1,376,779           43,974,327
  Fidelity Diversified International Fund                                                            244,593            4,197,209
  Fidelity Equity - Income II Fund                                                                 2,700,091           46,954,580
  Fidelity Growth Company Fund                                                                       575,079           20,369,301
  Fidelity Magellan Fund                                                                             304,130           24,014,123
  Fidelity Overseas Fund                                                                              50,600            1,113,208
  Fidelity 2000 Fund                                                                                  39,811              438,316
  Fidelity 2010 Fund                                                                                  74,870              856,507
  Fidelity 2020 Fund                                                                                 168,457            1,792,381
  Fidelity 2030 Fund                                                                                 125,117            1,281,195
  Fidelity 2040 Fund                                                                                  21,429              125,572
  Freedom Income Fund                                                                                 59,677              632,575
  Janus Worldwide Fund                                                                               427,922           13,749,138
  PIMCO Total Return Fund:  Class ADM                                                              1,658,848           17,699,913
  T. Rowe Price Small - Cap Stock Fund, Inc.                                                         596,115           12,816,467

Fidelity Group Trust for Employee Benefit Plans:
  Managed Income Portfolio II:  Class II                                                          82,028,407           82,028,407
  U.S. Equity Index Commingled Pool                                                                  706,075           18,548,584

Employer Security:
  Thermo Electron Corporation                                                                        589,530           11,861,344

  Loans to participants
     (for a term not exceeding 30 years, at interest rates of 5.25% to 7% per annum)                                    5,976,961
                                                                                                                     ------------

                                                                                                                     $351,047,301
                                                                                                                     ============

(1) All investments are a party in interest to the Plan.

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Thermo Electron Corporation Choice Plan
Exhibit Index
--------------------------------------------------------------------------------


Exhibit
Number    Description of Exhibit
--------------------------------------------------------------------------------

 23.1     Consent of PricewaterhouseCoopers LLP.

 23.2     Consent of Carlin, Charron, & Rosen LLP.

 99.1     Certification of the Vice President of Human Resources Pursuant to
          18 U.S.C. Section 1350.

 99.2     Certification of the Chief Financial Officer Pursuant to 18 U.S.C.
          Section 1350.

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