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                                                               Exhibit 12(a)(11)

Investor Contact: 781-622-1111
Media Contact: 781-622-1252

            THERMEDICS COMPLETES CASH TENDER OFFER FOR THERMO SENTRON

WOBURN, Mass., March 31, 2000 - Thermedics Inc. (ASE-TMD), a Thermo Electron
company, announced today that it has successfully completed the cash tender
offer of $15.50 per share for any and all outstanding shares of its Thermo
Sentron Inc. subsidiary.

         The offer and withdrawal rights expired at midnight on Thursday, March
30, 2000. Based on the preliminary report of the depositary for the offer,
American Stock Transfer & Trust Company, approximately 1,144,000 Thermo Sentron
shares were tendered. This brings Thermedics' and Thermo Electron's combined
equity ownership in Thermo Sentron to approximately 98.6 percent. Thermedics
expects to complete the spin-in of Thermo Sentron by Tuesday, April 4, through a
short-form merger. The short-form merger does not require Thermo Sentron board
or shareholder approval.

         Shareholders who tendered their shares in the tender offer will receive
payment for their shares shortly. Shareholders who did not tender their shares
will also receive $15.50 per share in the short-form merger. Information
outlining what steps these Thermo Sentron shareholders must take to obtain
payment will be mailed within a week to 10 days.

         The complete terms and conditions of the tender offer are set forth in
the offer to purchase, letter of transmittal, and other related materials, which
were filed with the Securities and Exchange Commission on March 3, 2000.

         Thermedics Inc. develops, manufactures, and markets diverse product
lines, including implantable heart-assist devices and other biomedical products,
security instruments, and equipment that assures the quality of a wide variety
of consumer products and bulk materials. Thermedics is a public subsidiary of
Thermo Electron Corporation. More information is available on the Internet at
http://www.thermo.com/subsid/tmd1.html.

The following constitutes a "Safe Harbor" statement under the Private Securities
Litigation Reform Act of 1995: This press release contains forward-looking
statements that involve a number of risks and uncertainties. Important factors
that could cause actual results to differ materially from those indicated by
such forward-looking statements are set forth under the heading "Forward-looking
Statements" in Exhibit 13 to the company's annual report on Form 10-K for the
year ended January 1, 2000. These include risks and uncertainties relating to:
government regulation and industry standards, competition and technological
change, intellectual property rights, reimbursement by insurers for medical
procedures, medical community acceptance of medical devices, availability of
materials and components, product liability, international operations,
acquisition strategy, and the company's cash management arrangement with Thermo
Electron.


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