EXHIBIT 4.3 OFFICERS' CERTIFICATE OF THERMO ELECTRON CORPORATION PURSUANT TO SECTION 301 OF THE INDENTURE IDENTIFIED BELOW The undersigned John N. Hatsopoulos and Kenneth J. Apicerno as the Chief Financial Officer and Treasurer, respectively, of Thermo Electron Corporation ("Company"), acting pursuant to authorizations contained in resolutions, copies of which are delivered herewith, duly adopted on July 17, 1997, July 14, 1998 and August 21, 1998 by the Board of Directors of the Company, and on October 26, 1998 by the Pricing Committee thereof, do hereby authorize, adopt and approve the following terms for a series (the "Series") of the Company's debt securities (the "Securities") to be issued under a Senior Indenture dated as of October 29, 1998, as amended by the First Supplemental Indenture dated as of October 29, 1998 (collectively, the "Indenture"), from the Company, as issuer, to Bankers Trust Company, as Trustee, pursuant to the Registration Statement on Form S-3 (No. 333-62957) under the Securities Act of 1933, as amended. Terms used herein without definition shall have the meanings ascribed to such terms in the Indenture. Article and Section references are to the Indenture. -2- - -------------------------------------------------------------------------------------------------------- Section The title or designation of the 7.625% Notes due October 30, 2008 (the "Notes"). 301 (1) Securities and the series in which the Securities shall be included: - -------------------------------------------------------------------------------------------------------- Section Any limit upon the aggregate principal $150,000,000 aggregate principal amount. 301 (2) amount of the Securities of such title or designation or the Securities of such series which may be authenticated and delivered under the Indenture (except for Securities authenticated and delivered upon registration or transfer of, or in exchange for, or in lieu of, other Securities of such series pursuant to Section 304, 305, 306, 905 or 1107 of the Indenture, upon repayment in part of any Security of such series pursuant to Article Fifteen, or upon surrender in part of any Security for conversion or exchange into other securities pursuant to its terms, or pursuant to the terms of such Securities): - -------------------------------------------------------------------------------------------------------- Section If the Securities are to be issuable as The Notes are to be issued only as Registered 301 (3) Registered Securities, as Bearer Notes. Securities or alternatively as Bearer Securities and Registered Securities, and whether the Bearer Securities are to be issuable with Coupons, without Coupons or both, and any restrictions applicable to the offer, sale or delivery of the Bearer Securities and the terms, if any, upon which Bearer Securities may be exchanged for Registered Securities and vice versa: - -------------------------------------------------------------------------------------------------------- -3- - -------------------------------------------------------------------------------------------------------- Section If any of the Securities are to be Registered Notes are to be issued solely in 301 (4) issuable in global form, when any of such permanent global form (except as otherwise Securities are to be issuable in global specified in Section 305). The Depository for form and (i) whether such Securities are the Registered Notes is the Depository Trust to be issued in temporary or permanent Company and any successor thereto. Registered global form or both, (ii) the extent to Notes shall be registered in the name of the which, or the manner in which, any Depository or its nominee (except as otherwise interest payment or Additional Amounts on specified in Section 305). Beneficial owners of a global Security on an Interest Payment interests in the permanent global Registered Date will be paid and the manner in which Notes may not exchange such interest for Notes, any principal of or premium, if any, on except as specified in Section 305. The original any global Security will be paid, (iii) issuance date for the Notes is October 29, 1998. whether beneficial owners of interests in any such global Security may exchange Additional Amounts will not be payable on the such interests for Securities of the same Notes. series and of like tenor and of any authorized form and denomination, and the The Company will make all payments of principal circumstances under which any such and interest on the Notes in immediately exchanges may occur, if other than in the available funds so long as the Notes are manner specified in Section 305 of the maintained in book-entry form. Indenture, (iv) the name of the Depository or the U.S. Depository, as the case may be, with respect to any global Security and, if applicable, any successor to the Depository or U.S. Depository, (v) the name of the Common Depository, if applicable, and (vi) the Exchange Date, if applicable: - -------------------------------------------------------------------------------------------------------- Section If any of the Securities are to be The Registered Notes in global form shall be 301 (5) issuable as Bearer Securities or in dated the date of original issuance of the first global form, the date as of which any of such Notes to be issued. All other Notes such Bearer Security or global Security shall be dated the date of their authentication. shall be dated (if other than the date of original issuance of the first of such Securities to be issued): - -------------------------------------------------------------------------------------------------------- -4- - -------------------------------------------------------------------------------------------------------- Section If any of the Securities are to be Not applicable. 301 (6) issuable as Bearer Securities, whether interest in respect of any portion of a temporary Bearer Security in global form payable in respect of an Interest Payment Date therefor prior to the Exchange Date, shall be paid to any clearing organization with respect to the portion of such temporary Bearer Security held for its account and, in such event, the terms and conditions (including any certification requirements) upon which any such interest payment received by a clearing organization will be credited to the Persons entitled to interest payable on such Interest Payment Date, if other than as provided in Section 304 of the Indenture: - -------------------------------------------------------------------------------------------------------- Section The date or dates, or the method or The Stated Maturity of the principal of the 301 (7) methods, if any, by which the date or Notes is October 30, 2008. dates shall be determined on which the principal of the Securities is payable: - -------------------------------------------------------------------------------------------------------- Section The rate or rates at which the Securities The Notes shall bear interest at the per annum 301 (8) shall bear interest, if any, or the rate of 7.625%. Interest shall accrue from the method or methods, if any, by which such date of original issuance of the Notes. The rate or rates are to be determined; the Interest Payment Dates for the Notes shall be date or dates, if any, from which such April 30 and October 30, in each year, interest shall accrue or the method or commencing April 30, 1999. The Regular Record methods, if any, by which such date or Dates for the interest payable on such Interest dates are to be determined; the Interest Payment Dates are April 15 and October 15, Payment Dates, if any, on which such respectively. Additional Amounts shall not be interest shall be payable and the Regular payable on the Notes. Record Date, if any, for the interest payable on Registered Securities on any Interest Payment Date; whether and under what circumstances Additional Amounts on such Securities or any of them shall be payable; the notice, if any, to Holders regarding the determination of interest on a floating rate Security and the manner of giving such notice, and the basis upon which interest shall be calculated if other than that of a 360-day year of twelve 30-day months: - -------------------------------------------------------------------------------------------------------- -5- - -------------------------------------------------------------------------------------------------------- Section If in addition to or other than the The Borough of Manhattan, The City of New York 301 (9) Borough of Manhattan, The City of New shall be the place where principal of, any York (or, in the case of Bearer premium and interest on the Notes shall be Securities, except as otherwise provided payable, any of such Notes may be surrendered in the Indenture, London, England), the for registration of transfer and exchange, any place or places where the principal of, of such Notes may be surrendered for transfer or any premium and interest on or any exchange in the circumstances described herein Additional Amounts with respect to such and in the Indenture, and notices or demands to Securities shall be payable, any of such or upon the Company in respect of such Notes and Securities may be surrendered for the Indenture may be served. registration of transfer and exchange, any of such Securities may be surrendered Principal, premium (if any), and interest for transfer, exchange or conversion in payments with respect to a global Note will be the circumstances described herein and paid in the manner set forth in the Indenture. in the Indenture, and notices or demands to or upon the Company in respect of such In the event the Note in permanent global form Securities and the Indenture may be is exchangeable for definitive Notes pursuant to served: Section 305 and the Notes are then listed on the Luxembourg Stock Exchange, Luxembourg shall be an additional place where the principal of, any premium and interest on the Notes shall be payable and any of such Notes may be surrendered for transfer or exchange in the circumstances described herein and in the Indenture. - -------------------------------------------------------------------------------------------------------- Section Whether any of the Securities are to be The Notes may be redeemed, at the option of the 301 (10) redeemable at the option of the Company Company, in whole or in part at any time on the and, if so, the date or dates on which, Redemption Date, upon notice as described in the the period or periods within which, the Indenture, at the Redemption Price. price or prices at which and the other terms and conditions upon which the The Redemption Price shall be equal to the Securities may be redeemed, in whole or greater of (i) 100% of the principal amount of in part, at the option of the Company the Notes and (ii) the sum of the present values and, if other than by a Company Board of the remaining scheduled payments of principal Resolution, the manner in which any and interest thereon (not including the portion election by the Company to redeem the of any such payments of interest accrued as of Securities shall be evidenced: the Redemption Date) discounted to the Redemption Date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Adjusted Treasury Rate (as defined below) (determined on the third Business Day preceding such Redemption Date), together, in each case, with accrued and unpaid interest to the Redemption Date. - -------------------------------------------------------------------------------------------------------- -6- - -------------------------------------------------------------------------------------------------------- "Adjusted Treasury Rate" means (i) the arithmetic mean of the yields under the heading "Week Ending" published in the Statistical Release most recently published prior to the date of determination under the caption "Treasury Constant Maturities" for the maturity (rounded to the nearest month) corresponding to the remaining life to maturity, as of the Redemption Date, of the Notes being redeemed plus (ii) 0.30%. If no maturity set forth under such heading exactly corresponds to the maturity of such Notes, yields for the two published maturities most closely corresponding to the maturity of such Notes shall be calculated by the Company pursuant to the immediately preceding sentence, and the Adjusted Treasury Rate shall be interpolated or extrapolated from such yields on a straight-line basis, rounding in each of the relevant periods to the nearest month. "Statistical Release" means the statistical release designated "H.15(519)" or any successor publication which is published weekly by the Federal Reserve System and which establishes yields on actively-traded United States government securities adjusted to the constant maturities, or, if such statistical release is not published at the time of any determination under the terms of the Notes, then such other reasonably comparable index which shall be designated by the Company. - -------------------------------------------------------------------------------------------------------- Section If the Company is obligated to redeem or Not applicable. 301 (11) purchase any of the Securities pursuant to any sinking fund or analogous provision or at the option of any Holder thereof (including under Article Fifteen of the Indenture) and, if so, the date or dates on which, the period or periods within which, the price or prices at which and the other terms and conditions upon which the Securities shall be redeemed or purchased, in whole or in part, pursuant to such obligation, and any provisions for the remarketing of the Securities so redeemed or purchased: - -------------------------------------------------------------------------------------------------------- -7- - -------------------------------------------------------------------------------------------------------- Section The denominations in which any of the None, except that the global Registered Note 301 (12) Securities that are Registered Securities held by the Depository shall be in such shall be issuable if other than principal amount as the officer(s) manually denominations of $1,000 and any integral executing the same shall approve, their manual multiple thereof, and the denominations execution thereof to be conclusive evidence of in which any of the Securities that are such approval. Bearer Securities shall be issuable if other than the denominations of $1,000 and $10,000: - -------------------------------------------------------------------------------------------------------- Section If other than the principal amount Not applicable. 301 (13) thereof, the portion of the principal amount of any of the Securities that shall be payable upon declaration of acceleration of the Maturity thereof pursuant to Section 502 of the Indenture or the method by which such portion is to be determined: - -------------------------------------------------------------------------------------------------------- Section If the amount of payments of principal Not applicable. 301 (14) of, any premium or interest on or any Additional Amounts with respect to the Securities may be determined with reference to an index, indices, formula or other method or methods (which index, indices, formula or method or methods may be based, without limitation, on one or more currencies, commodities, equity indices or other indices), and, if so, the terms and conditions upon which and the manner in which such amounts shall be determined and paid or payable: - -------------------------------------------------------------------------------------------------------- Section Any deletions from, modifications of or As set forth in the First Supplemental Indenture. 301 (15) additions to the Events of Default or covenants of the Company with respect to any of the Securities, whether or not such Events of Default or covenants are consistent with the Events of Default or covenants set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- -8- - -------------------------------------------------------------------------------------------------------- Section If either or both of Section 402(2) Both Section 402(2) and Section 402(3) shall be 301 (16) relating to defeasance or Section 402(3) applicable to the Notes. Sections 801, 1007 and relating to covenant defeasance, as set 1008 shall be subject to covenant defeasance as forth in the Indenture, shall be provided in the Indenture. applicable to the Securities, or any covenants in addition to those specified in Section 402(3) of the Indenture relating to the Securities which shall be subject to covenant defeasance, and any deletions from, or modifications or additions to, the provisions of Article Four of the Indenture in respect of the Securities shall apply: - -------------------------------------------------------------------------------------------------------- Section The terms, if any, on which the Not applicable. 301 (17) Securities may be converted into or exchanged for other securities of the Company: - -------------------------------------------------------------------------------------------------------- Section If any of the Securities are to be Not applicable. 301 (18) issuable in global form and are to be issuable in definitive form (whether upon original issue or upon exchange of a temporary Security) only upon receipt of certain certificates or other documents or satisfaction of other conditions, then the form and terms of such certificates, documents or conditions: - -------------------------------------------------------------------------------------------------------- Section If there is more than one Trustee, the The Trustee is: 301 (19) identity of the Trustee and, if not the Trustee, the identity of each Security Bankers Trust Company Registrar, Paying Agent, Conversion Agent or Authenticating Agent with respect to Four Albany Street such Securities: 4th Floor New York, NY 10006 The Trustee shall initially be the Security Registrar, the Authenticating Agent and the Paying Agent with respect to the Notes. In the event the Note in permanent global form is exchangeable for definitive Notes pursuant to Section 305 and the Notes are then listed on the Luxembourg Stock Exchange, Bankers Trust Luxembourg, S.A. shall be an additional Paying Agent. - -------------------------------------------------------------------------------------------------------- -9- - -------------------------------------------------------------------------------------------------------- Section [INTENTIONALLY OMITTED] 301 (20) - -------------------------------------------------------------------------------------------------------- Section Any other terms of the Securities and any The form of the Registered Note in global form 301 (21) deletions from or modifications or is attached to this Certificate as Exhibit A. additions to the Indenture in respect of The form of the definitive Registered Note, the Securities (which terms shall not be which is to be used only if one of the inconsistent with the provisions of the conditions set forth in the first sentence of Indenture, except as permitted by Section the seventh paragraph of Section 305 of the 901 thereof): Indenture has occurred, is attached to this Certificate as Exhibit B. - -------------------------------------------------------------------------------------------------------- Section Definition of Business Day, if other than Not applicable. 101 as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section Definition of United States, if other Not applicable. 101 than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section The extent to which an Indexed Security Not applicable. 101 is deemed Outstanding, if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section Whether an Opinion of Counsel may not be Not applicable. 101 given by an employee of the Company: - -------------------------------------------------------------------------------------------------------- Section Whether actions by Holders may not be Not applicable. 104 taken by proxy: - -------------------------------------------------------------------------------------------------------- Section Whether notice of any event given to Not applicable. 106 Holders shall be in a manner different than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section Payment or conversion on a day other than Not applicable. 114 a Business Day, if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section Whether the Securities initially shall be Not applicable. 204 issued in other than global form: - -------------------------------------------------------------------------------------------------------- -10- - -------------------------------------------------------------------------------------------------------- Section Whether payment of principal of, any Not applicable. 204 premium and (except for temporary global Bearer Securities) interest on, and any Additional Amounts in respect of, any temporary or permanent global Security shall be made to a Person or Persons other than the Person or Persons specified therein: - -------------------------------------------------------------------------------------------------------- Section The Persons whom the Trustee or any agent Not applicable. 204 of the Company or the Trustee shall treat as the Holder of the principal amount of the temporary global Bearer Security: - -------------------------------------------------------------------------------------------------------- Section Whether temporary Securities (other than Not applicable. 304(b) temporary global Bearer Securities), until exchanged for Definitive Securities of such series, will be entitled to the same benefits under the Indenture as Definitive Securities of such series: - -------------------------------------------------------------------------------------------------------- Section Whether temporary global Bearer Not applicable. 304(c) Securities shall have the same rights and benefits as definitive Bearer Securities: - -------------------------------------------------------------------------------------------------------- Section The terms on which a permanent global Not applicable. 305 Registered Security shall be exchangeable for definitive Securities, if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section The terms under which holders of Not applicable. 305 definitive Registered Securities and Bearer Securities may exchange such interest for securities in global form, if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section The terms on which interest on Bearer Not applicable. 306 Securities shall be paid without presentation and surrender of the applicable Coupon, if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- -11- - -------------------------------------------------------------------------------------------------------- Section The person or persons to receive payments Not applicable. 307(a) with respect to Registered Securities, if other than the registered holder (including DTC) thereof on the Regular Record Date: - -------------------------------------------------------------------------------------------------------- Section Manner in which payments of interest Not applicable. 307(a) shall be made if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section The terms on which a Bearer Security may Not applicable. 307(a) be exchanged for a Registered Security after a Regular Record Date and before an Interest Payment Date, if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section Circumstances under which payments on a Not applicable. 307(a), Bearer Security may be paid in the United 1002 States, if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section Method of paying interest, by check or Not applicable. 307(a) wire transfer or both, if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section The terms on which Defaulted Interest Not applicable. 307(b) shall be paid with respect to Registered Securities, if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section Whether Securities or Coupons shall be Not applicable. 309 authenticated in lieu of or in exchange for any Securities or Coupons canceled as provided in Section 309 of the Indenture, except as expressly permitted by or pursuant to the Indenture: - -------------------------------------------------------------------------------------------------------- Section Qualifications for an Authenticating Not applicable. 612 Agent, if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- Section Dates upon which the Company will furnish Not applicable. 701(1) names and addresses of Holders, if other than as set forth in the Indenture: - -------------------------------------------------------------------------------------------------------- -12- - -------------------------------------------------------------------------------------------------------- Section Whether the Company shall be required to As required by law or regulation. 1004 make all payments of principal of, premium, if any, and interest on Securities of any series to a Holder thereof who is not a United States person, without set-off, counterclaim, fees, liabilities or similar deductions (including payments on redemption and repayment), and free and clear of, and without deduction or withholding for Taxes: - -------------------------------------------------------------------------------------------------------- Section If the Company or any agent of the Additional Amounts will not be payable on the 1004 Company is required by law or regulation Notes. to make any deduction or withholding for or on account of Taxes, whether the Company shall pay such Additional Amounts as shall be necessary in order that the net amounts received by the Holders of the Securities of any series who are not United States Persons after such deduction or withholding shall equal the amount that would have been receivable thereunder in the absence of such deduction or withholding: - -------------------------------------------------------------------------------------------------------- Section Whether the covenant set forth in Section The covenant set forth in Section 1007 shall be 1007 1007 shall be for the benefit of the for the benefit of the Notes. Securities: - -------------------------------------------------------------------------------------------------------- Section Whether the covenant set forth on Section The covenant set forth in Section 1008 shall be 1008 1008 covenant shall be for the benefit of for the benefit of the Notes. the Securities: - -------------------------------------------------------------------------------------------------------- Section Whether the Company shall be required to The Company shall not be required to deposit 1105 deposit with the Trustee the accrued with the Trustee the accrued interest on the interest on and any Additional Amounts Notes being redeemed if the Redemption Date with respect to Securities being redeemed shall be an Interest Payment Date. if the Redemption Date shall be an Interest Payment Date: - -------------------------------------------------------------------------------------------------------- -13- - -------------------------------------------------------------------------------------------------------- Section If other than as set forth in the Not applicable. 1106 Indenture, whether installments of interest on Bearer Securities whose Stated Maturity is on or prior to the Redemption Date shall be payable other than upon the presentation and surrender of the Coupons for such interest: - -------------------------------------------------------------------------------------------------------- Section If other than as set forth in the Not applicable. 1106 Indenture, whether installments of interest on Registered Securities whose Stated Maturity is on or prior to the Redemption Date shall be payable to the Holders of such Securities registered as such at the close of business on the Regular Record Date: - -------------------------------------------------------------------------------------------------------- Issue price to public of Securities of 99.724% of the principal amount of the Notes. the Series: - -------------------------------------------------------------------------------------------------------- Underwriters' commission or discount as a 0.65%. percentage of the principal amount of Securities of the Series to be issued: - -------------------------------------------------------------------------------------------------------- REMAINDER OF PAGE INTENTIONALLY LEFT BLANK -14- IN WITNESS WHEREOF, the undersigned have executed this Certificate on behalf of the Company. THERMO ELECTRON CORPORATION By: /s/ John N. Hatsopoulos ----------------------- Name: John N. Hatsopoulos Title: Chief Financial Officer By: /s/ Kenneth J. Apicerno ----------------------- Name: Kenneth J. Apicerno Title: Treasurer Dated as of October 29, 1998 Exhibit A (FORM OF FACE OF REGISTERED GLOBAL SECURITIES) Unless this Security is presented by an authorized representative of The Depository Trust Company ("DTC"), 55 Water Street, New York, New York to the issuer or its agent for registration of transfer, exchange or payment, and such Security issued is registered in the name of CEDE & CO., or such other name as requested by an authorized representative of DTC, ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL, since the registered owner hereof, CEDE & CO., has an interest herein. Unless and until this Security is exchanged in whole or in part for Securities in certificated form, this Security may not be transferred except as a whole by DTC to a nominee thereof or by a nominee thereof to DTC or another nominee of DTC or by DTC or any such nominee to a successor of DTC or a nominee of such successor. THERMO ELECTRON CORPORATION (Incorporated in the State of Delaware) __% NOTE DUE __________ , 200_ No. R- _______________ CUSIP: _______________ Thermo Electron Corporation , a Delaware corporation (herein referred to as the "Company," which term includes any successor corporation under the Indenture referred to on the reverse hereof), for value received, hereby promises to pay to Cede & Co. or registered assigns the principal sum of $_______ (or any other amounts as are endorsed on the Schedule of Adjustments hereto) on ____________ (the "Stated Maturity") upon the presentation and surrender hereof, and to pay interest thereon from ______________ or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually in arrears on _____ and ________ of each year (each, an "Interest Payment Date"), commencing ________, at the rate of __% per annum, until the principal hereof is paid or duly provided for. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture, be paid to the Holder in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be the ________ or ______ (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date, by check mailed or delivered to the address of the Person entitled thereto as such address shall appear in the Security Register; provided, however, that such interest may be paid, at the ------------------ Company's option and with the consent of any Paying Agent, by transfer to an account maintained by the Payee with a bank located in the United States. Any such interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date, and may be paid to the Holder in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in the Indenture. Interest will be computed on the basis of a 360-day year of twelve 30-day months. All payments hereunder shall be made in United States Dollars. Subject to the applicable provisions of the Indenture, the aggregate principal amount represented by this global Security may be decreased to reflect exchanges or partial redemptions, by endorsing the Schedule of Adjustments hereto, and the principal amount hereof shall be deemed to be decreased for all purposes by the amount so exchanged or redeemed, as applicable. Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. Unless the Certificate of Authentication hereon has been executed by the Trustee by manual signature of one of its authorized signatories, this Security shall not be entitled to any benefit under the Indenture, or be valid or obligatory for any purpose. IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed under its facsimile corporate seal. Dated:_________________________ THERMO ELECTRON CORPORATION By:_______________________ Attest: Kenneth J. Apicerno Treasurer _______________________________ Secretary [SEAL] -2- CERTIFICATE OF AUTHENTICATION This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture. BANKERS TRUST COMPANY, as Trustee By: __________________________ Authorized Officer -3- (FORM OF REVERSE OF REGISTERED GLOBAL SECURITIES) THERMO ELECTRON CORPORATION This Security is one of a duly authorized issue of securities of the Company (herein called the "Securities"), issued and to be issued in one or more series under an Indenture, as amended by the First Supplemental Indenture, and as further supplemented by the Company's Officers' Certificate, each dated as of _____________, 1998 (collectively, the "Indenture") by the Company, as issuer, to Bankers Trust Company, as Trustee (herein called the "Trustee," which term includes any successor trustee under the Indenture with respect to the series of which this Security is a part), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities, and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one of the duly authorized series of Securities designated on the face hereof and the aggregate principal amount of the Securities to be issued under such series is limited to $____ (except for Securities authenticated and delivered upon transfer of, or in exchange for, or in lieu of other Securities). The Holders of the Securities will be entitled to the benefits of, be bound by, and be deemed to have notice of, all of the provisions of the Indenture. A copy of the Indenture is on file and may be inspected at the office of the Paying Agents appointed by the Company. All terms used in this Security that are defined in the Indenture shall have the meanings assigned to them in the Indenture. The Securities are issuable as registered securities (the "Registered Securities"), without Coupons, in denominations of U.S. $1,000 and integral multiples thereof, except as otherwise provided in or pursuant to the Indenture. The Registered Securities, and transfers thereof, shall be registered as provided in the Indenture. The registered holder of a Registered Security shall (to the fullest extent permitted by applicable law) be treated at all times, by all persons and for all purposes as the absolute owner of such Security, regardless of any notice of ownership, theft or loss or of any writing thereon. The Securities are general, unsecured obligations of the Company. No Additional Amounts shall be paid on the Securities. If an Event of Default, as defined in the Indenture, shall occur and be continuing, the principal of the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture. The Indenture contains provisions for defeasance and covenant defeasance with respect to this Security, in each case upon compliance with certain conditions set forth therein. The Securities are not convertible into or exchangeable for the Company's Common Stock and will not be entitled to the benefit of any sinking fund. The Securities may be redeemed as provided in or pursuant to the Indenture, at the option of the Company, in whole or in part at any time on the Redemption Date, upon notice as described in the Indenture, at the Redemption Price. The Redemption Price shall be equal to the greater of (i) 100% of the principal amount of the Securities and (ii) the sum of the present values of the remaining scheduled payments of principal and interest thereon (not including the portion of any such payments of interest accrued as of the Redemption Date) discounted to the Redemption Date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Adjusted Treasury Rate (as defined below) (determined on the third Business Day preceding such Redemption Date), together, in each case, with accrued and unpaid interest to the Redemption Date. "Adjusted Treasury Rate" means (i) the arithmetic mean of the yields under the heading "Week Ending" published in the Statistical Release most recently published prior to the date of determination under the caption "Treasury Constant Maturities" for the maturity (rounded to the nearest month) corresponding to the remaining life to maturity, as of the Redemption Date, of the Securities being redeemed, plus (ii) 0.30%. If no maturity set forth under such heading exactly corresponds to the maturity of such Securities, yields for the two published maturities most closely corresponding to the maturity of such Securities shall be calculated pursuant to the immediately preceding sentence, and the Adjusted Treasury Rate shall be interpolated or extrapolated from such yields on a straight-line basis, rounding in each of the relevant periods to the nearest month. "Statistical Release" means the statistical release designated "H.15(519)" or any successor publication which is published weekly by the Federal Reserve System and which establishes yields on actively-traded United States government securities adjusted to the constant maturities, or, if such statistical release is not published at the time of any determination under the terms of the Securities, then such other reasonably comparable index which shall be designated by the Company. Notice of redemption will be given to Holders of Securities, not less than 20 nor more than 60 days prior to the Redemption Date, all as provided in the Indenture. The Place of Payment, place of registration of transfer and exchange and the place of transfer and exchange for the Registered Securities shall be the Borough of Manhattan, the City of New York, and the Corporate Trust Office of the Trustee shall be the Company's Office or Agency in the Borough of Manhattan, the City of New York for such purpose. The Trustee initially shall be the Security Registrar, the Authenticating Agent, and a Paying Agent. The Trustee presently has its Corporate Trust Office at Four Albany Street, 4th Floor, New York, NY 10006. In addition, the Company has appointed Bankers Trust Luxembourg, S.A. as a Paying Agent. Bankers Trust Luxembourg, S.A.'s Office in Luxembourg is currently located at 14 Boulevard F.D. Roosevelt, l-2450 Luxembourg. The Company may subsequently appoint a new Office or Agency with respect to the Registered Securities. The Indenture permits the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities under the Indenture at any time as specified therein. The Indenture also contains provisions permitting the waiver of compliance by the company with certain provisions of the Indenture. Furthermore, provisions in the Indenture permit the waiver of certain past defaults under the Indenture and their consequences. -5- No reference herein to the Indenture and no provision of this Security or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of, premium, if any, and interest, on this Security at the times, places and rates, and in the coin or currency, herein and therein prescribed. The Indenture and the Securities shall be governed by and construed in accordance with the laws of the Commonwealth of Massachusetts applicable to agreements made and to be performed entirely in such Commonwealth except that the rights, protections, obligations, indemnities and immunities of the Trustee under the Indenture and the Securities shall be governed by the laws of the State of New York, without regard to the principles of conflicts of laws of either state. -6- SCHEDULE OF ADJUSTMENTS REMAINING PRINCIPAL PRINCIPAL AMOUNT NOTATION MADE AMOUNT OF FOLLOWING SUCH ON BEHALF OF DATE MADE ADJUSTMENT ADJUSTMENT THE TRUSTEE - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------- ------------------ -------------------- ------------------ - --------------------------------------------------------------------------------------------------- -7- TRANSFER NOTICE FOR VALUE RECEIVED, the undersigned Holder hereby sell(s), assign(s) and transfer(s) unto ________________________________________________________________________________ ________________________________________________________________________________ _____________ whose taxpayer identification number is _____________________ and whose address including postal/zip code is _____________________________________ the within Security and all rights thereunder, hereby irrevocably constituting and appointing _____________________________ attorney-in-fact to transfer said Security on the books of the Security Registrar with full power of substitution in the premises. Dated: Name: _______________ __________________________ By: __________________________ Title: _________________________ NOTICE: The signature of the Holder to this assignment must correspond with the name as written upon the face of the within instrument in every particular, without enlargement or any change whatsoever. SIGNATURE GUARANTEED _______________________________ Exhibit B (FORM OF FACE OF REGISTERED SECURITIES) THERMO ELECTRON CORPORATION (Incorporated in the State of Delaware) __% NOTE DUE __________ , 200_ No. R- _____________ CUSIP: ____________ Thermo Electron Corporation , a Delaware corporation (herein referred to as the "Company," which term includes any successor corporation under the Indenture referred to on the reverse hereof), for value received, hereby promises to pay to ____________ or registered assigns the principal sum of $_______ on ____________ (the "Stated Maturity") upon the presentation and surrender hereof, and to pay interest thereon from ______________ or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually in arrears on _____ and ________ of each year (each, an "Interest Payment Date"), commencing ________, at the rate of __% per annum, until the principal hereof is paid or duly provided for. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture, be paid to the Holder in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be the ________ or ______ (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date by check mailed or delivered to the address of the Person entitled thereto as such address shall appear in the Security Register; provided, however, that such interest may be paid, at the Company's --------- -------- option and with the consent of any Paying Agent, by transfer to an account maintained by the Payee with a bank located inside the United States. Any such interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date, and may be paid to the Holder in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in the Indenture. Interest will be computed on the basis of a 360-day year of twelve 30-day months. All payments hereunder shall be made in United States Dollars. Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. Unless the Certificate of Authentication hereon has been executed by the Trustee by manual signature of one of its authorized signatories, this Security shall not be entitled to any benefit under the Indenture, or be valid or obligatory for any purpose. IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed under its facsimile corporate seal. Dated:_________________________ THERMO ELECTRON CORPORATION By:_______________________ Attest: Kenneth J. Apicerno Treasurer _______________________________ Secretary [SEAL] -2- CERTIFICATE OF AUTHENTICATION This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture. BANKERS TRUST COMPANY, as Trustee By: ____________________________ Authorized Officer -3- (FORM OF REVERSE OF REGISTERED SECURITIES) THERMO ELECTRON CORPORATION This Security is one of a duly authorized issue of securities of the Company (herein called the "Securities"), issued and to be issued in one or more series under an Indenture, as amended by the First Supplemental Indenture, and as further supplemented by the Company's Officers' Certificate, each dated as of _____________, 1998 (collectively, the "Indenture") by the Company, as issuer, to Bankers Trust Company, as Trustee (herein called the "Trustee," which term includes any successor trustee under the Indenture with respect to the series of which this Security is a part), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities, and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one of the duly authorized series of Securities designated on the face hereof and the aggregate principal amount of the Securities to be issued under such series is limited to $____ (except for Securities authenticated and delivered upon transfer of, or in exchange for, or in lieu of other Securities). The Holders of the Securities will be entitled to the benefits of, be bound by, and be deemed to have notice of, all of the provisions of the Indenture. A copy of the Indenture is on file and may be inspected at the office of the Paying Agents appointed by the company. All terms used in this Security that are defined in the Indenture shall have the meanings assigned to them in the Indenture. The Securities are issuable as registered securities (the "Registered Securities"), without coupons, in denominations of U.S. $1,000 and integral multiples thereof, except as otherwise provided in or pursuant to the Indenture. The Registered Securities, and transfers thereof, shall be registered as provided in the Indenture. The registered holder of a Registered Security shall (to the fullest extent permitted by applicable law) be treated at all times, by all persons and for all purposes as the absolute owner of such Security, regardless of any notice of ownership, theft or loss or of any writing thereon. The Securities are general, unsecured obligations of the Company. No additional amounts shall be paid on the Securities. If an Event of Default, as defined in the Indenture, shall occur and be continuing, the principal of the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture. The Indenture contains provisions for defeasance and covenant defeasance with respect to this Security, in each case upon compliance with certain conditions set forth therein. The Securities are not convertible into or exchangeable for the Company's Common Stock and will not be entitled to the benefit of any sinking fund. The Securities may be redeemed as provided in the Indenture, at the option of the Company, in whole or in part at any time on the Redemption Date, upon notice as described in the Indenture, at the Redemption Price. The Redemption Price shall be equal to the greater of (i) 100% of the principal amount of the Securities and (ii) the sum of the present values of the remaining scheduled payments of principal and interest thereon (not including the portion of any such payments of interest accrued as of the Redemption Date) discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Adjusted Treasury Rate (as defined below) (determined on the third business day preceding such Redemption Date), together, in each case, with accrued and unpaid interest to the Redemption Date. "Adjusted Treasury Rate" means (i) the arithmetic mean of the yields under the heading "Week Ending" published in the Statistical Release most recently published prior to the date of determination under the caption "Treasury Constant Maturities" for the maturity (rounded to the nearest month) corresponding to the remaining life to maturity, as of the Redemption Date, of the Securities being redeemed, plus (ii) 0.30%. If no maturity set forth under such heading exactly corresponds to the maturity of such Securities, yields for the two published maturities most closely corresponding to the maturity of such Securities shall be calculated pursuant to the immediately preceding sentence, and the adjusted treasury rate shall be interpolated or extrapolated from such yields on a straight-line basis, rounding in each of the relevant periods to the nearest month. "Statistical Release" means the statistical release designated "H.15(519)" or any successor publication which is published weekly by the Federal Reserve System and which establishes yields on actively-traded United States Government Securities adjusted to the constant maturities, or, if such statistical release is not published at the time of any determination under the terms of the Securities, then such other reasonably comparable index which shall be designated by the Company. Notice of redemption will be given to holders of securities, not less than 20 nor more than 60 days prior to the Redemption Date, all as provided in the Indenture. The Place of Payment, place of registration of transfer and exchange and the place of transfer and exchange for the Registered Securities shall be the Borough of Manhattan, The City of New York, and the Corporate Trust Office of the Trustee shall be the Company's Office or Agency in the Borough of Manhattan, the City of New York for such purpose. The Trustee initially shall be the Security Registrar, the Authenticating Agent, and a Paying Agent. The Trustee presently has its Corporate Trust Office at Four Albany Street, 4th Floor, New York, NY 10006. In addition, the Company has appointed Bankers Trust Luxembourg, S.A. as a Paying Agent. Bankers Trust Luxembourg, S.A.'S Office in Luxembourg is currently located at 14 Boulevard F.D. Roosevelt, L-2450 Luxembourg. The Company may subsequently appoint a new Office or Agency with respect to the Registered Securities. The Indenture permits the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities under the Indenture at any time as specified therein. The Indenture also contains provisions permitting the waiver of compliance by the Company with certain provisions of the Indenture. Furthermore, provisions in the Indenture permit the waiver of certain past defaults under the Indenture and their consequences. -2- No reference herein to the Indenture and no provision of this Security or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of, premium, if any, and interest, on this Security at the times, places and rates, and in the coin or currency, herein and therein prescribed. The Indenture and the Securities shall be governed by and construed in accordance with the laws of the Commonwealth of Massachusetts applicable to agreements made and to be performed entirely in such Commonwealth except that the rights, protections, obligations, indemnities and immunities of the Trustee under the Indenture and the Securities shall be governed by the laws of the State of New York, without regard to the principles of conflicts of laws of either state. -3- TRANSFER NOTICE FOR VALUE RECEIVED, the undersigned Holder hereby sell(s), assign(s) and transfer(s) unto ________________________________________________________________________________ ________________________________________________________________________________ _____________ whose taxpayer identification number is _____________________ and whose address including postal/zip code is _____________________________________ the within Security and all rights thereunder, hereby irrevocably constituting and appointing _____________________________ attorney-in-fact to transfer said Security on the books of the Security Registrar with full power of substitution in the premises. Dated: Name: __________________ _____________________________ By: ______________________________ Title: _____________________________ NOTICE: The signature of the Holder to this assignment must correspond with the name as written upon the face of the within instrument in every particular, without enlargement or any change whatsoever. SIGNATURE GUARANTEED ___________________________________