THERMO BIOANALYSIS CORP /DE
10-K, 1997-03-18
LABORATORY ANALYTICAL INSTRUMENTS
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                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                  _____________________________________________
                                    FORM 10-K
    (mark one)
    [ X ] Annual Report Pursuant to Section 13 or 15(d) of the Securities
          Exchange Act of 1934 for the fiscal year ended December 28, 1996

    [   ] Transition Report Pursuant to Section 13 or 15(d) of the Securities
          Exchange Act of 1934

                         Commission file number 1-12179

                         THERMO BIOANALYSIS CORPORATION
             (Exact name of Registrant as specified in its charter)

    Delaware                                                       85-0429899
    (State or other jurisdiction of                          (I.R.S. Employer
    incorporation or organization)                        Identification No.)

    504 Airport Road
    Santa Fe, New Mexico                                           87504-2108
    (Address of principal executive offices)                       (Zip Code)
       Registrant's telephone number, including area code: (617) 622-1000

           Securities registered pursuant to Section 12(b) of the Act:

           Title of each class           Name of exchange on which registered
       ----------------------------      ------------------------------------
       Common Stock, $.01 par value            American Stock Exchange

           Securities registered pursuant to Section 12(g) of the Act:
                                      None

    Indicate by check mark whether the Registrant (1) has filed all reports
    required to be filed by Section 13 or 15(d) of the Securities Exchange
    Act of 1934 during the preceding 12 months (or for such shorter period
    that the registrant was required to file such reports), and (2) has been
    subject to the filing requirements for at least the past 90 days.
    Yes [ X ]  No [   ]

    Indicate by check mark if disclosure of delinquent filers pursuant to
    Item 405 of Regulation S-K is not contained herein, and will not be
    contained, to the best of the Registrant's knowledge, in definitive proxy
    or information statements incorporated by reference into Part III of this
    Form 10-K or any amendment to this Form 10-K. [   ]

    The aggregate market value of the voting stock held by nonaffiliates of
    the Registrant as of January 24, 1997, was approximately $40,240,275.

    As of January 24, 1997, the Registrant had 9,771,500 shares of Common
    Stock outstanding.
                       DOCUMENTS INCORPORATED BY REFERENCE
    Portions of the Registrant's Annual Report to Shareholders for the year
    ended December 28, 1996, are incorporated by reference into Parts I and
    II.

    Portions of the Registrant's definitive Proxy Statement for the Annual
    Meeting of Shareholders to be held on June 2, 1997, are incorporated by
    reference into Part III.
PAGE
<PAGE>
                                     PART I

    Item 1. Business

    (a) General Development of Business

        Thermo BioAnalysis Corporation (the Company or the Registrant)
    designs, manufactures, and markets instruments and information management
    systems used in biochemical research and production, as well as in
    clinical diagnostics. The Company has three principal product lines: life
    sciences instrumentation, information management systems, and health
    physics instrumentation. The Company's life sciences instrumentation
    group includes its DYNEX Technologies (DYNEX), Affinity Sensors, and
    MALDI-TOF mass spectrometer subsidiaries and its capillary
    electrophoresis (CE) division, through which the Company designs,
    manufactures, and markets a broad range of instruments and consumables
    based on proprietary immunoassay, optical biosensor, mass spectrometry,
    and CE technologies. The Company's LabSystems subsidiary designs,
    implements, and supports laboratory information management systems (LIMS)
    and chromatography data systems. The Company's Eberline health physics
    subsidiary supplies radiation detection and counting instrumentation and
    sophisticated radiation monitoring systems to the nuclear industry
    worldwide. The Company was incorporated in February 1995 as a wholly
    owned subsidiary of Thermo Instrument Systems Inc. (Thermo Instrument).
    Thermo Instrument is a publicly traded, majority-owned subsidiary of
    Thermo Electron Corporation (Thermo Electron).

        The Company's strategy is to develop and market a portfolio of
    instruments and information management systems for biochemistry and other
    applications through research and development of innovative products and
    through the acquisition of complementary businesses and technologies. In
    February 1996, the Company acquired DYNEX, which supplies automated
    systems, detection systems, and consumables for the immunoassay market,
    for $43.2 million in cash. In July 1996, the Company acquired for $9.0
    million in cash the Affinity Sensors and LabSystems divisions of Fisons
    plc (Fisons) from Thermo Instrument, which had acquired a substantial
    portion of the Scientific Instruments Division of Fisons from
    Rhone-Poulenc Rorer, Inc. on March 29, 1996. The purchase price is
    subject to a post-closing adjustment based on a post-cloing adjustment to
    be negotiated with Fisons by Thermo Instrument in connection with the
    settlement of the final purchase price for all of the businesses of
    Fisons acquired by Thermo Instrument in March 1996. Affinity Sensors
    supplies optical biosensors used in life sciences research by the
    pharmaceutical and biotechnology industries, universities, and medical
    research institutes. Affinity Sensors was established to develop and
    commercialize products based on a new technology, optical biosensors, and
    commenced commercial sales in 1993. LabSystems designs, implements, and
    supports laboratory information management systems and chromatography
    data systems used in research and development, quality assurance and
    control, and processing plants.

        In September 1996, the Company commenced an initial public offering
    of 1,670,000 shares of its common stock at $14.00 per share for net
    proceeds of $20.8 million. As of December 28, 1996, Thermo Instrument
    owned 6,500,000 shares of the common stock of the Company, representing
    67% of such stock outstanding. Thermo Instrument develops, manufactures,
    and markets instruments used to detect and measure air pollution,
                                        2PAGE
<PAGE>
    radioactivity, complex chemical compounds, toxic metals, and other
    elements in a broad range of liquids and solids, as well as to control
    and monitor various industrial processes. As of December 28, 1996, Thermo
    Electron owned 59,200 shares of the common stock of the Company,
    representing .61% of such stock outstanding. These shares were purchased
    during 1996* in the open market for a total purchase price of $809,000.
    Thermo Electron is a world leader in environmental monitoring and
    analysis instruments, biomedical products such as heart-assist devices
    and mammography systems, papermaking and paper-recycling equipment,
    biomass electric power generation, and other specialized products and
    technologies. Thermo Electron also provides a range of services related
    to environmental quality.

    Forward-looking Statements

        Forward-looking statements, within the meaning of Section 21E of the
    Securities Exchange Act of 1934, are made throughout this Annual Report
    on Form 10-K. For this purpose, any statements contained herein that are
    not statements of historical fact may be deemed to be forward-looking
    statements. Without limiting the foregoing, the words "believes,"
    "anticipates," "plans," "expects," "seeks," "estimates," and similar
    expressions are intended to identify forward-looking statements. There
    are a number of important factors that could cause the results of the
    Company to differ materially from those indicated by such forward-looking
    statements, including those detailed under the caption "Forward-looking
    Statements" in the Registrant's 1996 Annual Report to Shareholders
    incorporated herein by reference.

    (b) Financial Information About Industry Segments

        The Company conducts business in one industry segment.

    (c) Description of Business

        (i) Principal Products and Services

        The Company designs, manufactures, and markets instruments and
    information management systems for use in biochemical research and
    production, as well as in clinical diagnostics. The Company markets and
    distributes its products through a number of channels, including a direct
    sales force, independent sales representatives, distributors, and OEMs.
    The method of distribution is determined by product line and market size
    and potential, as well as by local business convention, industry mix, and
    the availability of technically-qualified representatives.

        The Company focuses on three principal product areas:

        Life Sciences Instrumentation. The Company markets a broad range of
        instruments and consumables based on proprietary immunoassay, optical
        biosensor, mass spectrometry, and capillary electrophoresis (CE)
        technologies.


    *   References to 1996, 1995, and 1994 herein are for the fiscal years
        ended December 28, 1996, December 30, 1995, and December 31, 1994,
        respectively.
                                        3PAGE
<PAGE>
        Information Management Systems. The Company offers laboratory
        information management systems (LIMS) and chromatography data systems
        (CDS) for use in laboratories and clinical testing facilities. The
        Company's information management systems are designed to facilitate
        the monitoring and analysis of samples throughout the laboratory or
        clinical lifecycle.

        Health Physics Instrumentation. The Company markets radiation
        detection instrumentation and complete radiation monitoring systems
        for use in and around nuclear power plants and other facilities where
        radioactive materials are used.

    Life Sciences Instrumentation.

        The Company designs, manufactures, and markets a broad range of
    instruments and consumables based on proprietary immunoassay, optical
    biosensor, mass spectrometry, and capillary electrophoresis technologies.
    The Company's products include automated systems, detection systems, and
    consumables for the immunoassay market; optical biosensors; MALDI-TOF
    mass spectrometers; and capillary electrophoresis systems, components,
    and accessories.

        Immunoassay. The Company's DYNEX subsidiary designs, manufactures,
    sells, and supports products for immunoassay testing. Immunoassay is an
    analytical method used for the qualitative and quantitative analysis of
    biological molecules. Immunoassay products are used in medical and
    pharmaceutical research; clinical diagnostics including tests for
    pregnancy, hepatitis, and HIV; veterinary medicine; agricultural
    diagnostics; water quality testing; and food and beverage testing. In
    1996, the Company introduced the MLX luminescence detection system, and a
    third-generation fully automated testing system, the DIAS Ultra.

        The Company has focused its sales efforts on the clinical diagnostic
    and research markets, including healthcare and hospital facilities,
    chemical and pharmaceutical manufacturers, universities, medical and
    pharmaceutical research laboratories, veterinary and agricultural
    research laboratories, and governmental institutions such as the U.S.
    Food and Drug Administration, the National Institute of Health, and the
    Center for Disease Control. The Company's products are used principally
    by large clinical and research laboratories and manufacturers, including
    pharmaceutical companies, where large-batch, high-volume testing methods
    are required.

        The Company sells its immunoassay products principally through its
    direct sales force, OEMs, and distributors throughout the world. The
    company maintains direct sales offices in the Czech Republic, France,
    Germany, Hong Kong, Russia, the United Kingdom, and the United States.
    The Company also sells through manufacturers' representatives. The
    Company sells to clinical laboratories and hospitals primarily through
    OEM arrangements with major reagent manufacturers that purchase
    consumables and instruments for resale to their customers.

                                        4PAGE
<PAGE>
        Optical Biosensors. Optical biosensor systems are a new technology
    used to quantify biomolecules and characterize their functional
    properties. Optical biosensor systems monitor the interaction of two or
    more biological compounds by measuring changes in the refractive index
    caused by molecular activity. The Company's Affinity Sensors subsidiary
    designs, develops, and sells optical biosensors for life sciences
    research in the pharmaceutical and biotechnology industries,
    universities, and medical research institutes. The Company offers both
    manual and automated versions of its optical biosensor system for
    performing a broad range of assays and affinity measurements. In 1996,
    the Company introduced an automated optical biosensor system, and is
    currently developing multi-analyte biosensors. 

        The Company's optical biosensor products serve a variety of
    geographic markets. In the United Kingdom and the United States, the
    Company maintains direct sales and service offices, as well as
    distributors. In Australia, Belgium, France, Germany, Italy, Japan, the
    Netherlands, Spain, Scandinavia, Switzerland, and Singapore, the Company
    distributes its optical biosensor products through an arrangement with
    Thermo Instrument.

        MALDI-TOF Mass Spectrometry. The Company currently offers three
    MALDI-TOF mass spectrometers, including an enhanced benchtop MALDI-TOF
    mass spectrometer that has significantly enhanced resolution, which was
    introduced in 1996. Mass spectrometry measures the molecular weight of a
    sample's components, thereby enabling identification and measurement of
    organic chemical compounds and/or inorganic elements contained in the
    sample. Historically, mass spectrometry has been of little use to
    biochemists because mass spectrometry measurements of large molecules,
    such as the biomolecules that comprise peptides and proteins that have
    molecular weights in excess of 3,000 daltons, were not possible.

        The development of ionization techniques such as those used in the
    MALDI-TOF mass spectrometer have solved this problem. MALDI-TOF mass
    spectrometers, first commercially available in 1990, measure the amount
    of time required for an ionized molecule to reach a detector, and convert
    that measurement into a measurement of mass. Using these devices,
    biochemists can measure molecules with molecular weights of up to 500,000
    daltons.

        The Company distributes its MALDI-TOF mass spectrometry products
    through its direct sales force in the United States and Western Europe,
    and through sales representatives elsewhere in the world. In Japan, the
    Company distributes its MALDI-TOF mass spectrometry products through an
    arrangement with ThermoQuest Corporation (ThermoQuest), a majority-owned
    subsidiary of Thermo Instrument.

        Capillary Electrophoresis. Capillary electrophoresis (CE) is a
    purification and separation technique commercially introduced in 1989. CE
    systems separate molecules as they move through an extremely narrow tube,
    or capillary, that is charged with an electric field. The Company's line
    of CE systems includes a low-cost, manually-controlled CE system and a
    fully-automated CE system with multiple wavelength detectors. In 1996,
    the Company introduced its new generation CE system that has more than
    twice the sample capacity of competing products, thereby permitting users

                                        5PAGE
<PAGE>
    to decrease labor costs by allowing longer periods of unattended
    operation. The Company's CE systems offer high sensitivity, as well as
    advanced data handling, control, and automation features. The Company
    also offers a line of CE capillaries, buffers, and other consumables.

        The largest market for CE systems are pharmaceutical companies, whose
    research activities require state-of-the-art CE systems and related
    supplies. One of the principal applications for CE systems is the
    analysis and separation of biomolecules such as proteins, peptides, and
    nucleic acids, including DNA. Applications of DNA separation by CE
    include the identification of specific individuals through DNA
    "fingerprinting" and the diagnosis of diseases and specific genetic
    disorders such as leukemia, hepatitis, and sickle cell anemia.

        ThermoQuest distributes the Company's CE products and is the
    exclusive distributor of such products in jurisdictions in which it
    maintains a direct sales force.

        Life sciences instrumentation revenues were $40,623,000, $6,308,000,
    and $6,467,000 in 1996, 1995, and 1994, respectively.

    Information Management Systems

        The Company's LabSystems subsidiary designs, develops, and supports
    LIMS and CDS, and is recognized as one of the world's leading LIMS
    suppliers. The Company also maintains an implementation support group
    that provides software customization and project management services for
    its customers. The Company's products are distributed throughout a wide
    user base including research and development, quality assurance/quality
    control, and processing facilities. A substantial majority of the
    Company's customers are Fortune 500 companies in the process chemical,
    aerospace, pharmaceutical, environmental, oil and gas, petrochemical,
    automotive, food and beverage, agricultural, and medical products
    industries. 

        The Company's CDS products are open system analytical tools that
    assist users in analyzing chromatographic data obtained via gas and
    liquid chromatography and capillary electrophoresis.

        The Company's LIMS and CDS products serve a variety of geographic
    markets. In the United Kingdom and the United States, the Company
    maintains direct sales and service offices, as well as a network of
    distributors. In Australia, Brazil, Canada, France, Germany, Italy, the
    Middle East, the Netherlands, Scandinavia, Singapore, South Africa, and
    Spain, the Company distributes its LIMS and CDS products through an
    arrangement with Thermo Instrument.

        Information management systems revenues were $16,217,000 from March
    29, 1996, the date Thermo Instrument acquired LabSystems, through
    December 28, 1996.

                                        6PAGE
<PAGE>
    Health Physics Instrumentation

        The Company produces a broad range of products, including portable
    and stand-alone instruments and computer-integrated systems that detect
    and measure nuclear radiation in and around nuclear power plants and
    other facilities where radioactive materials are used.

        Approximately 58% of the radiation monitoring instruments sold by the
    Company are purchased for use in nuclear power plants and United States
    Department of Energy facilities. The remainder are sold to medical and
    educational institutions, the military service, state and local
    governments, and others.

        The Company also designs, manufactures, and installs complete
    computer-integrated systems for monitoring effluents from nuclear power
    plants and for making radiation measurements at strategic locations
    throughout such facilities. These systems comprise a network of radiation
    monitors and data acquisition subsystems that process and store
    measurements and, on request, transmit data to a central system
    controller for display and recordkeeping.

        The Company sells its health physics instruments directly through
    sales and support offices in the United States and Canada, and through
    sales representatives elsewhere in the world.

        Health physics revenues were $14,809,000, $16,226,000, and
    $18,660,000 in 1996, 1995, and 1994, respectively.

        (ii) New Products

        The Company's business includes the research and development of new
    products. (see "Principal Products and Services.")

        (iii) Raw Materials

        Raw materials, components, and supplies purchased by the Company are
    either available from a number of different suppliers or from alternative
    sources that could be developed without a material adverse effect on the
    Company. To date, the Company has experienced no difficulties in
    obtaining these materials.

        (iv) Patents, Licenses, and Trademarks

        The Company's policy is to protect its intellectual property rights
    and to apply for patent protection when appropriate. The Company
    currently holds several issued United States patents expiring at various
    dates ranging from 2002 to 2011. The Company also has applications
    pending for additional United States patents and a number of foreign
    counterparts for its patents in various foreign countries. In addition,
    the Company has registered, or other, trademarks. Patent protection
    provides the Company with competitive advantages with respect to certain
    systems. The Company believes, however, that technical know-how and trade
    secrets are more important to its business than patent protection.

                                        7PAGE
<PAGE>
        The Company seeks to maintain the confidentiality of its proprietary
    technology that is not covered by patent protection by requiring
    employees who work with proprietary information to sign confidentiality
    agreements and by limiting access by parties outside the Company to such
    confidential information. There can be no assurance, however, that these
    measures will prevent the unauthorized disclosure or use of this
    information, or that others will not be able to independently develop
    such information. Moreover, as is the case with the Company's patent
    rights, the enforcement by the Company of its trade secret rights can be
    lengthy and costly, with no guarantee of success.

        (v) Seasonal Influences

        There are no significant seasonal influences on the Company's sales
    of its products and services.

        (vi) Working Capital Requirements

        There are no special inventory requirements or credit terms extended
    to customers that would have a material adverse effect on the Company's
    working capital.

        (vii) Dependency on a Single Customer

        No single customer accounted for more than 10% of the Company's
    total revenues in any of the past three years.

        (viii) Backlog

        The backlog of firm orders was $13.6 million and $2.5 million as of
    December 28, 1996, and December 30, 1995, respectively. The Company
    believes that substantially all of its 1996 backlog will be completed
    during 1997.

        (ix) Government Contracts

        Less than 10% of the Company's total revenues in 1996 were derived
    from contracts or subcontracts with the federal government, which are
    subject to renegotiation of profits or termination. The Company does not
    have any knowledge of threatened or pending renegotiations or
    terminations.

        (x) Competition

        The markets for the Company's products are highly competitive. In
    each of the markets it serves, the Company competes with a number of
    companies, many of which have greater engineering, manufacturing, and
    marketing resources than the Company.

    Life Sciences Instrumentation

        Immunoassay. The Company competes in the immunoassay market primarily
    on the basis of technological innovation, performance (including
    throughput and sensitivity), flexibility, and price. The Company's 

                                        8PAGE
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    principal competitors in the consumables or plastics market include
    Nunc-Nalge Inc., Greiner GmbH, and Corning-Costar Corporation. In the
    detection systems market, the Company competes primarily with Bio-Tek
    Instruments, Inc. and Molecular Devices Corporation. In the automated
    systems market, the Company's main competitors include BioChem Pharma
    Inc., Immunosystems, Inc., Hamilton Bonaduz AG, and Tecan AG.

        Optical Biosensors. The Company competes in the optical biosensor
    market primarily on the basis of ease and flexibility of use, technical
    performance, analytical throughput, speed of data analysis, and price.
    The dominant competitor in the market for optical biosensors is Biocore
    International, Inc., a majority-owned subsidiary of Pharmacia & Upjohn,
    Inc.

        MALDI-TOF Mass Spectrometry. The Company competes in the MALDI-TOF
    mass spectrometry market primarily on the basis of the technical
    performance of its MALDI-TOF mass spectrometers as well as on the need in
    the analytical biochemistry community for highly-automated mass
    spectrometers. To a lesser degree, the Company also competes on the basis
    of price. Principal competitors in the mass spectrometry market include
    PerSeptive Biosystems, Inc., Shimadzu Corporation, Hewlett-Packard
    Company (Hewlett-Packard), Bruker Instruments Inc., and Micromass Ltd.

        Capillary Electrophoresis. The Company competes in the market for CE
    systems primarily on the basis of technical performance and automation
    features, and, to a lesser extent, price. The Company's principal
    competitors in the CE market include Beckman Instruments, Inc. (Beckman),
    Bio-Rad Laboratories, Inc., and Hewlett-Packard.

    Information Management Systems

        The Company competes in the high-end LIMS and CDS markets primarily
    on the basis of the functionality, flexibility, and technical
    sophistication of its systems, as well as on its ability to tailor its
    software packages to a customer's specific laboratory protocols, its
    ability to provide superior customer service and technical support, and
    price. Significant competitors in the LIMS and CDS markets include
    Perkin-Elmer Corporation, Beckman, Hewlett-Packard, the Laboratory
    MicroSystems, Inc. subsidiary of Instron Corporation, and Waters
    Instruments, Inc.

    Health Physics Instrumentation 

        Although there has been a trend toward consolidation among suppliers
    of health physics instrumentation over the last five years, the market
    for health physics instrumentation remains fragmented. The Company
    competes in this market primarily on the basis of product reliability and
    technological innovation, and price. Significant competitors include the
    Instruments Group of EG&G, Inc., the Nuclear Products Division of Morgan
    Crucible Co. plc, the Bicron/NE Technology division of
    Saint-Gobain-Norton Industrial Ceramics Corporation, and The Rados
    Companies.
                                        9PAGE
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        (xi) Research and Development

        During 1996, 1995, and 1994, the Company expended approximately
    $7,298,000, $1,325,000, and $2,042,000, respectively, on internally
    sponsored research and development programs.

        (xii) Environmental Protection Regulations

        The Company believes that compliance by the Company with federal,
    state, and local environmental regulations will not have a material
    adverse effect on its capital expenditures, earnings, or competitive
    position. 

        (xiii) Number of Employees

        As of December 28, 1996, the Company had a total of 483 employees.

    (d) Financial Information about Exports by Domestic Operations and
        About Foreign Operations

        Financial information about exports by domestic operations and about
    foreign operations is summarized in Note 8 to Consolidated Financial
    Statements in the Company's 1996 Annual Report to Shareholders and is
    incorporated herein by reference.

    (e) Executive Officers of the Registrant

                                   Present Title (Year First
         Name                 Age  Became Executive Officer)
         -------------------  ---  ----------------------------------------
         Barry S. Howe         41  Chief Executive Officer and President
                                     (1995)
         Donald W. Hanna       40  Vice President (1995)
         John N. Hatsopoulos   62  Vice President and Chief Financial
                                     Officer (1995)
         Paul F. Kelleher      54  Chief Accounting Officer (1995)

        Each executive officer serves until his successor is chosen or
    appointed by the Board of Directors and qualified or until earlier
    resignation, death, or removal. Messrs. Hatsopoulos and Kelleher have
    held comparable positions for at least five years with Thermo Instrument
    and Thermo Electron. Mr. Howe has been Chief Executive Officer,
    President, and a Director of the Company since its inception in February
    1995. Prior to joining the Company, Mr. Howe was President of Thermo
    Instrument's Thermo Separation Products Inc. subsidiary and its
    predecessor, a manufacturer of liquid chromatography instruments, from
    September 1989 to December 1995. Mr. Hanna has been Vice President of the
    Company since its inception in February 1995, and has been President of
    the Company's Eberline subsidiary since 1994. Prior to joining the
    Company, Mr. Hanna was President of Thermo Instrument's National Nuclear
    Corporation subsidiary, a manufacturer of products for the nuclear power
    industry, from 1990 through 1994.

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    Item 2. Properties

        The Company owns approximately 67,000 square feet of manufacturing,
    sales, and administration space in New Mexico. The Company leases 130,000
    square feet of manufacturing, sales, and administration space in
    Virginia, Channel Islands, and England, including 14,000 square feet
    subleased from ThermoQuest, under leases expiring from 1997 through 2016.
    In addition, the Company leases 29,000 square feet of sales space in
    Germany, England, Massachusetts, Hong Kong, and the Czech Republic, under
    leases expiring from 1997 through 2001. The Company believes that its
    facilities are in good condition and are suitable and adequate to meet
    current needs.

    Item 3. Legal Proceedings

         Not applicable.

    Item 4. Submission of Matters to a Vote of Security Holders

         Not applicable.

    Item 5. Market for Registrant's Common Equity and Related Stockholder
            Matters

        Information concerning the market and market price for the
    Registrant's common stock, $.01 par value, and dividend policy is
    included under the sections labeled "Common Stock Market Information" and
    "Dividend Policy" in the Registrant's 1996 Annual Report to Shareholders
    and is incorporated herein by reference.

    Item 6. Selected Financial Data

        The information required under this item is included under the
    sections labeled "Selected Financial Information" and "Dividend Policy"
    in the Registrant's 1996 Annual Report to Shareholders and is
    incorporated herein by reference.

    Item 7. Management's Discussion and Analysis of Financial Condition and
            Results of Operations

        The information required under this item is included under the
    heading "Management's Discussion and Analysis of Financial Condition and
    Results of Operations" in the Registrant's 1996 Annual Report to
    Shareholders and is incorporated herein by reference.

    Item 8. Financial Statements and Supplementary Data

         The Registrant's Consolidated Financial Statements and
    Supplementary Data are included in the Registrant's 1996 Annual Report to
    Shareholders and are incorporated herein by reference.

    Item 9. Changes in and Disagreements with Accountants on Accounting and
            Financial Disclosures

        Not applicable.

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    Item 10. Directors and Executive Officers of the Registrant

        The information concerning directors required under this item is
    incorporated herein by reference from the material contained under the
    caption "Election of Directors" in the Registrant's definitive proxy
    statement to be filed with the Securities and Exchange Commission
    pursuant to Regulation 14A, not later than 120 days after the close of
    the fiscal year. The information concerning delinquent filers pursuant to
    Item 405 of Regulation S-K is incorporated herein by reference from the
    material contained under the heading "Section 16(a) Beneficial Ownership
    Reporting Compliance" under the caption "Stock Ownership" in the
    Registrant's definitive proxy statement to be filed with the Securities
    and Exchange Commission pursuant to Regulation 14A, not later than 120
    days after the close of the fiscal year.

    Item 11. Executive Compensation

        The information required under this item is incorporated herein by
    reference from the material contained under the caption "Executive
    Compensation" in the Registrant's definitive proxy statement to be filed
    with the Securities and Exchange Commission pursuant to Regulation 14A,
    not later than 120 days after the close of the fiscal year.

    Item 12. Security Ownership of Certain Beneficial Owners and Management

        The information required under this item is incorporated herein by
    reference from the material contained under the caption "Stock Ownership"
    in the Registrant's definitive proxy statement to be filed with the
    Securities and Exchange Commission pursuant to Regulation 14A, not later
    than 120 days after the close of the fiscal year.

    Item 13. Certain Relationships and Related Transactions

        The information required under this item is incorporated herein by
    reference from the material contained under the caption "Relationship
    with Affiliates" in the Registrant's definitive proxy statement to be
    filed with the Securities and Exchange Commission pursuant to Regulation
    14A, not later than 120 days after the close of the fiscal year.


                                       12PAGE
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                                     PART IV


    Item 14. Exhibits, Financial Statement Schedules, and Reports on Form 8-K

    (a,d)    Financial Statements and Schedules

             (1)The consolidated financial statements set forth in the list
                below are filed as part of this Report.

             (2)The consolidated financial statement schedule set forth in
                the list below is filed as part of this Report.

             (3)Exhibits filed herewith or incorporated herein by reference
                are set forth in Item 14(c) below.

             List of Financial Statements and Schedules Referenced in this
             Item 14

             Information incorporated by reference from Exhibit 13 filed
             herewith:

                Consolidated Statement of Operations
                Consolidated Balance Sheet
                Consolidated Statement of Cash Flows
                Consolidated Statement of Shareholders' Investment
                Notes to Consolidated Financial Statements
                Report of Independent Public Accountants

             Financial Statement Schedules filed herewith:

                Schedule II: Valuation and Qualifying Accounts

             All other schedules are omitted because they are not applicable
             or not required, or because the required information is shown
             either in the financial statements or in the notes thereto.

    (b)      Reports on Form 8-K


             None.

    (c)      Exhibits

             See Exhibit Index on the page immediately preceding exhibits.

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<PAGE>
                                   SIGNATURES

         Pursuant to the requirements of Section 13 or 15(d) of the
    Securities Exchange Act of 1934, the Registrant has duly caused this
    report to be signed on its behalf by the undersigned, thereunto duly
    authorized.

    Date: March 17, 1997          THERMO BIOANALYSIS CORPORATION


                                  By: Barry S. Howe
                                      ---------------------------------
                                      Barry S. Howe
                                      President and Chief Executive Officer

         Pursuant to the requirements of the Securities Exchange Act of
    1934, this report has been signed below by the following persons on
    behalf of the Registrant and in the capacities indicated, as of March 17,
    1997.

    Signature                           Title
    ---------                           -----

    By: Barry S. Howe               President, Chief Executive Officer,
        -------------------------
        Barry S. Howe                     and Director

    By: John N. Hatsopoulos         Vice President and Chief Financial
        -------------------------
        John N. Hatsopoulos               Officer

    By: Paul F. Kelleher            Chief Accounting Officer
        -------------------------
        Paul F. Kelleher

    By: Richard W. K. Chapman       Chairman of the Board and Director
        -------------------------
        Richard W. K. Chapman

    By: Elias P. Gyftopoulos        Director
        -------------------------
        Elias P. Gyftopoulos

    By: Denis A. Helm               Vice Chairman of the Board and
        -------------------------
        Denis A. Helm                     Director

    By: Jonathan W. Painter         Director
        -------------------------
        Jonathan W. Painter

    By: Arvin H. Smith              Director
        -------------------------
        Arvin H. Smith

    By: Arnold N. Weinberg          Director
        -------------------------
        Arnold N. Weinberg
                                       14PAGE
<PAGE>
                    Report of Independent Public Accountants
                    ----------------------------------------


    To the Shareholders and Board of Directors of Thermo BioAnalysis
    Corporation:

         We have audited, in accordance with generally accepted auditing
    standards, the consolidated financial statements included in Thermo
    BioAnalysis Corporation's Annual Report to Shareholders incorporated by
    reference in this Form 10-K, and have issued our report thereon dated
    February 11, 1997. Our audits were made for the purpose of forming an
    opinion on those statements taken as a whole. The schedule listed in Item
    14 on page 13 is the responsibility of the company's management and is
    presented for purposes of complying with the Securities and Exchange
    Commission's rules and is not part of the basic consolidated financial
    statements. The schedule has been subjected to the auditing procedures
    applied in the audits of the basic consolidated financial statements and,
    in our opinion, fairly states in all material respects the consolidated
    financial data required to be set forth therein in relation to the basic
    consolidated financial statements taken as a whole.



                                                Arthur Andersen LLP



    Boston, Massachusetts
    February 11, 1997




                                       15PAGE
<PAGE>
SCHEDULE II


                         THERMO BIOANALYSIS CORPORATION

                        Valuation and Qualifying Accounts
                                 (In thousands)

                      Balance             Provision                    Balance
                           at               Charged  Accounts               at
                    Beginning   Accounts         to   Written           End of
Description           of Year  Recovered    Expense       Off  Other(a)   Year
- ------------------------------------------------------------------------------

Year Ended
  December 28, 1996

    Allowance for
      Doubtful
      Accounts          $ 154      $   9      $ 210     $(188)   $ 806   $ 991

Year Ended
  December 30, 1995

    Allowance for
      Doubtful
      Accounts          $ 154      $   -      $   2     $  (2)   $   -   $ 154

Year Ended
  December 31, 1994

    Allowance for
      Doubtful
      Accounts          $ 153      $  15      $   -     $ (14)   $   -   $ 154

(a) Allowances of businesses acquired during the year as described in Note 2 to
    Consolidated Financial Statements in the Registrant's 1996 Annual Report to
    Shareholders and the effect of foreign currency translation.






                                       16PAGE
<PAGE>
                                  EXHIBIT INDEX

    Exhibit
    Number     Description of Exhibit

      2*       Purchase Agreement dated as of February 5, 1996, by and among
               the Company, Dynatech Corporation, and certain of their
               respective affiliates. 

      3.1*     Certificate of Incorporation of the Company.

      3.2*     By-Laws of the Company.

      4*       Form of Common Stock Certificate.

     10.1*     Corporate Services Agreement dated as of February 27, 1995,
               between Thermo Electron Corporation ("Thermo Electron") and
               the Company.

     10.2      Thermo Electron Corporate Charter, as amended and restated
               effective January 3, 1993 (incorporated by reference herein
               from Exhibit 10.1 to Thermo Electron's Annual Report on Form
               10-K for the fiscal year ended January 2, 1993 [File No.
               1-8002]).

     10.3*     Tax Allocation Agreement dated as of February 27, 1995,
               between Thermo Electron and the Company.

     10.4      Amended and Restated Master Repurchase Agreement dated as of
               December 28, 1996, between Thermo Electron and the Company.

     10.5*     Master Guarantee Reimbursement Agreement dated as of February
               27, 1995, among Thermo Electron, Thermo Instrument and the
               Company.

     10.6*     Master Guarantee Reimbursement Agreement dated as of February
               27, 1995, between Thermo Instrument and the Company.

     10.7*     Equity Incentive Plan of the Company.

               In addition to the stock-based compensation plans of the
               Company, the executive officers of the Company may be granted
               awards under stock-based compensation plans of Thermo
               Electron and Thermo Instrument for services rendered to the
               Company or such affiliated corporations. Thermo Electron's
               plans were filed as Exhibits 10.21 through 10.44 to the
               Annual Report on Form 10-K of Thermo Electron for the fiscal
               year ended December 30, 1995 [File No. 1-8002] and as Exhibit
               10.19 to the Annual Report on Form 10-K of Trex Medical
               Corporation for the fiscal year ended September 28, 1996
               [File No. 1-11827], and Thermo Instrument's plans were filed
               as Exhibits 10.18 through 10.27 to the Annual Report on Form
               10-K of Thermo Instrument for the fiscal year ended December
               28, 1996, [File No. 1-9786], and are incorporated herein by
               reference.

                                       17PAGE
<PAGE>
                                  EXHIBIT INDEX

    Exhibit
    Number     Description of Exhibit

     10.8*     Deferred Compensation Plan for Directors of the Company.

     10.9*     Directors Stock Option Plan of the Company.

     10.10*    Form of Indemnification Agreement for Officers and Directors.

     10.11*    Asset Transfer Agreement dated as of February 27, 1995,
               between Thermo Instrument and the Company.

     10.12*    Asset Transfer Agreement dated as of February 27, 1995,
               between Thermo Separation Products Inc. and the Company.

     10.13*    Exclusive License Agreement dated as of February 27, 1995,
               between Thermo Separation Products Inc. and the Company.

     10.14*    Exclusive License Agreement dated as of February 27, 1995,
               between the Company and Thermo Separation Products Inc.

     10.15*    Manufacturing Agreement dated as of February 27, 1995,
               between Thermo Separation Products Inc. and the Company.

     10.16*    Note Purchase Agreement dated as of July 22, 1996, between
               Thermo Instrument and the Company.

     10.17*    $50,000,000 Principal Amount 4.875% Convertible Subordinated
               Note due 2001 dated July 22, 1996.

     10.18*    Asset and Share Purchase Agreement dated as of July 22, 1996,
               among SID Instruments Inc., HB Instruments Inc., the Company
               and Thermo Instrument.

     10.19*    Asset Purchase Agreement dated as of July 22, 1996, among
               Thermo LabSystems Limited, FI Instruments Inc., Thermo FAST
               U.K. Limited, the Company, and Thermo Instrument.

     10.20     Restated Stock Holding Assistance Plan and Form of Promissory
               Note.

     11        Statement re: Computation of Earnings per Share.

     13        Annual Report to Shareholders for the year ended December
               28, 1996 (only those portions incorporated herein by
               reference).

     21        Subsidiaries of the Company.

     27        Financial Data Schedule.

               Each exhibit above which is marked with an asterisk (*) is
               incorporated by reference to the correspondingly numbered
               exhibit to the Company's Registration Statement on Form S-1
               [File No. 333-8697].
                                       18PAGE
<PAGE>



                                                             Exhibit 10.4
                AMENDED AND RESTATED MASTER REPURCHASE AGREEMENT


             The Master Repurchase Agreement dated as of February 27,
        1995 between Thermo Electron Corporation, a Delaware corporation
        ("Seller"), and Thermo BioAnalysis Corporation, a Delaware
        corporation (the "Buyer"), is hereby amended and restated in its
        entirety as follows on and as of December 28, 1996.

        1.   Applicability

             From time to time Buyer and Seller may enter into
        transactions in which Seller agrees to transfer to Buyer certain
        securities and/or financial instruments ("Securities") against
        the transfer of funds by Buyer, with a simultaneous agreement by
        Buyer to transfer to Seller such Securities on demand, against
        the transfer of funds by Seller.  Each such transaction shall be
        referred to herein as a "Transaction" and shall be governed by
        this Agreement, unless otherwise agreed in writing.

        2.   Definitions

             (a)  "Act of Insolvency", with respect to either party (i)
        the commencement by such party as debtor of any case or
        proceeding under any bankruptcy, insolvency, reorganization,
        liquidation, dissolution or similar law, or such party seeking
        the appointment of a receiver, trustee, custodian or similar
        official for such party or any substantial part of its property;
        or (ii) the commencement of any such case or proceeding against
        such party, or another seeking such an appointment, which (A) is
        consented to or not timely contested by such party, (B) results
        in the entry of an order for relief, such an appointment or the
        entry of an order having a similar effect, or (C) is not
        dismissed within 15 days; or (iii) the making by a party of a
        general assignment for the benefit of creditors; or (iv) the
        admission in writing by a party of such party's inability to pay
        such party's debts as they become due; 

             (b)  "Additional Purchased Securities", Securities provided
        by Seller to Buyer pursuant to Paragraph 4(a) hereof; 

             (c)  "Income", with respect to any Security at any time, any
        principal thereof then payable and all interest, dividends or
        other distributions thereon; 

             (d)  "Market Value", with respect to any Securities as of
        any date, the price for such Securities on such date obtained
        from a generally recognized source agreed to by the parties or
        the most recent closing bid quotation from such a source, plus
        accrued Income to the extent not included therein (other than any
        Income transferred to Seller pursuant to Paragraph 6 hereof) as
        of such date (unless contrary to market practice for such
        Securities);
PAGE
<PAGE>
             (e)  "Other Buyers", third parties that have entered into an
        agreement with Seller that is substantially similar to this
        Agreement; 

             (f)  "Pricing Rate", a rate equal to the Commercial Paper
        Composite rate for 90-day maturities provided by Merrill Lynch,
        Pierce, Fenner & Smith Incorporated (or, if such rate is not
        available, a substantially equivalent rate agreed to by Buyer and
        Seller) plus 25 basis points, which rate shall be adjusted on the
        first business day of each fiscal quarter and shall be in effect
        for the entirety such fiscal quarter;
         
             (g)  "Purchase Price", the price at which Purchased
        Securities are transferred by Seller to Buyer; 

             (h)  "Purchased Securities", the Securities transferred by
        Seller to Buyer in a Transaction hereunder, and any Securities
        substituted therefor in accordance with Paragraph 9 hereof.  The
        term "Purchased Securities" with respect to any Transaction at
        any time also shall include Additional Purchase Securities
        transferred pursuant to Paragraph 4(a) and shall exclude
        Securities returned pursuant to Paragraph 4(b);  

             (i)  "Repurchase Collateral Account", a book account
        maintained by Seller containing, among other Securities, the
        Purchased Securities; and

             (j)  "Repurchase Price", for any Purchased Security, an
        amount equal to the Purchase Price paid by Buyer to Seller for
        such Purchased Security. 

        3.   Transactions

             (a)  A Transaction may be initiated by Buyer upon the
        transfer of the Purchase Price to Seller's account.  Upon such
        transfer, Seller shall transfer to Buyer Purchased Securities
        having a Market Value equal to 103% of the Purchase Price.

             (b)  Purchased Securities shall be held in custody for Buyer
        by Seller in the Repurchase Collateral Account.  Seller shall
        indicate on its books for such account Buyer's ownership of the
        Purchased Securities.  Upon reasonable request from Buyer, Seller
        shall provide Buyer with a complete list of Purchased Securities
        owned by Buyer.  

             (c)  Upon demand by Buyer or Seller, Seller shall repurchase
        from Buyer, and Buyer shall sell to Seller, for the Repurchase
        Price all or any part of the Purchased Securities then owned by
        Buyer.

                                        2PAGE
<PAGE>
        4.   Margin Maintenance

             (a)  If at any time the aggregate Market Value of all
        Purchased Securities then owned by Buyer is less than 103% of the
        aggregate Repurchase Price for such Purchased Securities, then
        Seller shall transfer to Buyer additional Securities ("Additional
        Purchased Securities"), so that the aggregate Market Value of
        such Purchased Securities, including any such Additional
        Purchased Securities, will thereupon equal or exceed 103% of such
        aggregate Repurchase Price.

             (b)  If at any time the aggregate Market Value of all
        Purchased Securities then owned by Buyer exceeds 103% of the
        aggregate Repurchase Price for such Purchased Securities, then
        Seller may transfer Purchased Securities to Seller, so that the
        aggregate Market Value of such Purchased Securities will
        thereupon not exceed 103% of such aggregate Repurchase Price.

        5.   Interest Payments

             If during any fiscal month Buyer owned Purchased Securities,
        then on the first day of the next following fiscal month Seller
        shall pay to Buyer an amount equal to the sum of the aggregate
        Repurchase Prices of the Purchased Securities owned by Buyer at
        the close of each day during the preceding fiscal month divided
        by the number of days in such month and the product multiplied by
        the Pricing Rate times the number of days in such month divided
        by 360.

        6.   Income Payments and Voting Rights

             Where a particular Transaction's term extends over an Income
        payment date on the Purchased Securities subject to that
        Transaction, Buyer shall, on the date such Income is payable,
        transfer to Seller an amount equal to such Income payment or
        payments with respect to any Purchased Securities subject to such
        Transaction.  Seller shall retain all voting rights with respect
        to Purchased Securities sold to Buyer under this Agreement.

        7.   Security Interest

             Although the parties intend that all Transactions hereunder
        be sales and purchases and not loans, in the event any such
        Transactions are deemed to be loans, Seller shall be deemed to
        have pledged to Buyer as security for the performance by Seller
        of its obligations under each such Transaction and this
        Agreement, and shall be deemed to have granted to Buyer a
        security interest in, all of the Purchased Securities with
        respect to all Transactions hereunder and all proceeds thereof.

                                        3PAGE
<PAGE>
        8.   Payment and Transfer

             Unless otherwise mutually agreed, all transfers of funds
        hereunder shall be in immediately available funds.  As used
        herein with respect to Securities, "transfer" is intended to have
        the same meaning as when used in Section 8-313 of the
        Massachusetts Uniform Commercial Code or, where applicable, in
        any federal regulation governing transfers of the Securities.

        9.   Substitution

             Buyer hereby grants Seller the authority to manage, in
        Seller's sole discretion, the Purchased Securities held in
        custody for Buyer by Seller in the Repurchase Collateral Account.
        Buyer expressly agrees that Seller may (i) substitute other
        Securities for any Purchased Securities and (ii) commingle
        Purchased Securities with other Securities held in the Repurchase
        Collateral Account.  Substitutions shall be made by transfer to
        Buyer of such other Securities and transfer to Seller of the
        Purchased Securities for which substitution is being made.  After
        substitution, the substituted Securities shall be deemed to be
        Purchased Securities.  Securities which are substituted for
        Purchased Securities shall have a Market Value at the time of
        substitution equal to or greater than the Market Value of the
        Purchase Securities for which such Securities were substituted.

        10.  Representations

             Each of Buyer and Seller represents and warrants to the
        other that (i) it is duly authorized to execute and deliver this
        Agreement, to enter into the Transactions contemplated hereunder
        and to perform its obligations hereunder and has taken all
        necessary action to authorize such execution, delivery and
        performance, (ii) the person signing this Agreement on its behalf
        is duly authorized to do so on its behalf, (iii) it has obtained
        all authorizations of any governmental body required in
        connection with this Agreement and the Transactions hereunder and
        such authorizations are in full force and effect and (iv) the
        execution, delivery and performance of this Agreement and the
        Transactions hereunder will not violate any law, ordinance,
        charter, by-law or rule applicable to it or any agreement by
        which it is bound or by which any of its assets are affected.  On
        the date for any Transaction Buyer and Seller shall each be
        deemed to repeat all the foregoing representations made by it.

        11.  Events of Default

             In the event that (i) Seller fails to repurchase or Buyer
        fails to transfer Purchased Securities upon demand for repurchase
        from either Buyer or Seller, (ii) Seller or Buyer fails, after
        one business day's notice, to comply with Paragraph 4 hereof,
        (iii) Buyer fails to make payment to Seller pursuant to Paragraph
        6 hereof, (iv) Seller fails to comply with Paragraph 5 hereof,
        (v) an Act of Insolvency occurs with respect to Seller or Buyer,

                                        4PAGE
<PAGE>
        (vi) any representation made by Seller or Buyer shall have been
        incorrect or untrue in any material respect when made or repeated
        or deemed to have been made or repeated, or (vii) Seller or Buyer
        shall admit to the other its inability to, or its intention not
        to, perform any of its obligations hereunder (each an "Event of
        Default"):

             (a)  At the option of the nondefaulting party, exercised by
        written notice to the defaulting party (which option shall be
        deemed to have been exercised, even if no notice is given,
        immediately upon the occurrence of any Act of Insolvency), Seller
        shall become obligated to repurchase, and Buyer shall become
        obligated to sell, all Purchased Securities then owned by Buyer
        for the Repurchase Price of such Purchased Securities.

             (b)  If Seller is the defaulting party and Buyer exercises
        or is deemed to have exercised the option referred to in
        subparagraph (a) of this Paragraph, (i) the Seller's obligations
        hereunder to repurchase all Purchased Securities in such
        Transactions shall thereupon become immediately due and payable,
        (ii) all Income paid after such exercise or deemed exercise shall
        be retained by Buyer and applied to the aggregate unpaid
        Repurchase Prices owed by Seller, and (iii) Seller shall
        immediately deliver to Buyer any Purchased Securities subject to
        such Transactions then in Seller's possession.

             (c)  In all Transactions in which Buyer is the defaulting
        party, upon tender by Seller of payment of the aggregate
        Repurchase Prices for all such Transactions, Buyer's right, title
        and interest in all Purchased Securities subject to such
        Transactions shall be deemed transferred to Seller, and Buyer
        shall deliver all such Purchased Securities to Seller.

             (d)  After one business day's notice to the defaulting party
        (which notice need not be given if an Act of Insolvency shall
        have occurred, and which may be the notice given under
        subparagraph (a) of this Paragraph or the notice referred to in
        clause (ii) of the first sentence of this Paragraph), the
        nondefaulting party may: 

                  (i)  as to Transactions in which Seller is the
        defaulting party, (A) immediately sell, in a recognized market at
        such price or prices as Buyer may reasonably deem satisfactory,
        any or all Purchased Securities subject to such Transactions and
        apply the proceeds thereof to the aggregate unpaid Repurchase
        Prices and any other amounts owing by Seller hereunder or (B) in
        its sole discretion elect, in lieu of selling all or a portion of
        such Purchased Securities, to give Seller credit for such
        Purchased Securities in an amount equal to the price therefor on
        such date, obtained from a generally recognized source or the
        most recent closing bid quotation from such a source, against the
        aggregate unpaid Repurchase Prices and any other amounts owing by
        Seller hereunder; and

                                        5PAGE
<PAGE>
                  (ii) as to Transactions in which Buyer is the
        defaulting party, (A) purchase securities ("Replacement
        Securities") of the same class and amount as any Purchased
        Securities that are not delivered by Buyer to Seller as required
        hereunder or (B) in its sole discretion elect, in lieu of
        purchasing Replacement Securities, to be deemed to have purchased
        Replacement Securities at the price therefor on such date,
        obtained from a generally recognized source or the most recent
        closing bid quotation from such a source.

             (e)  As to Transactions in which Buyer is the defaulting
        party, Buyer shall be liable to Seller (i) with respect to
        Purchased Securities (other than Additional Purchased
        Securities), for any excess of the price paid (or deemed paid) by
        Seller for Replacement Securities therefor over the Repurchase
        Price for such Purchased Securities and (ii) with respect to
        Additional Purchased Securities, for the price paid (or deemed
        paid) by Seller for the Replacement Securities therefor.  

             (g)  The defaulting party shall be liable to the
        nondefaulting party for the amount of all reasonable legal or
        other expenses incurred by the nondefaulting party in connection
        with or as a consequence of an Event of Default.

             (h)  The nondefaulting party shall have, in addition to its
        rights hereunder, any rights otherwise available to it under any
        other agreement or applicable law.

        12.  Single Agreement

             Buyer and Seller acknowledge that, and have entered hereinto
        and will enter into each Transaction hereunder in consideration
        of and in reliance upon the fact that, all Transactions hereunder
        constitute a single business and contractual relationship and
        have been made in consideration of each other.  Accordingly, each
        of Buyer and Seller agrees (i) to perform all of its obligations
        in respect of each Transaction hereunder, and that a default in
        the performance of any such obligations shall constitute a
        default by it in respect of all Transactions hereunder, (ii) that
        each of them shall be entitled to set off claims and apply
        property held by them in respect of any Transaction against
        obligations owing to them in respect of any other Transactions
        hereunder and (iii) that payments, deliveries and other transfers
        made by either of them in respect of any Transaction shall be
        deemed to have been made in consideration of payments, deliveries
        and other transfers in respect of any other Transactions
        hereunder, and the obligations to make any such payments,
        deliveries and other transfers may be applied against each other
        and netted.

                                        6PAGE
<PAGE>
        13.  Entire Agreement; Severability

             This Agreement shall supersede any existing agreements
        between the parties containing general terms and conditions for
        repurchase transactions.  Each provision and agreement and
        agreement herein shall be treated as separate and independent
        from any other provision or agreement herein and shall be
        enforceable notwithstanding the unenforceability of any such
        other provision or agreement.

        14.  Non-assignability; Termination

             The rights and obligations of the parties under this
        Agreement and under any Transactions shall not be assigned by
        either party without the prior written consent of the other
        party.  Subject to the foregoing, this Agreement and any
        Transactions shall be binding upon and shall inure to the benefit
        of the parties and their respective successors and assigns.  This
        Agreement may be canceled by either party upon giving written
        notice to the other, except that this Agreement shall,
        notwithstanding such notice, remain applicable to any
        Transactions then outstanding.

        15.  Governing Law

             This Agreement shall be governed by the laws of the
        Commonwealth of Massachusetts without giving effect to the
        conflict of law principles thereof.

        16.  No Waivers, Etc.

             No express or implied waiver of any Event of Default by
        either party shall constitute a waiver of any other Event of
        Default and no exercise of any remedy hereunder by any party
        shall constitute a wavier of its right to exercise any other
        remedy hereunder.  No modification or waiver of any provision of
        this Agreement and no consent by any party to a departure
        herefrom shall be effective unless and until such shall be in
        writing and duly executed by both of the parties hereto. 

        17.  Intent

             (a)  The parties recognize that each Transaction is a
        "repurchase agreement" as that term is defined in Section 101 of
        Title 11 of the United States Code, as amended (except insofar as
        the type of Securities subject to such Transaction or the term of
        such Transaction would render such definition inapplicable), and
        a "securities contract" as that term is defined in Section 741 of
        Title 11 of the United States Code, as amended.

             (b)  It is understood that either party's right to liquidate
        Securities delivered to it in connection with Transactions
        hereunder or to exercise any other remedies pursuant to Paragraph
        11 hereof, is a contractual right to liquidate such Transaction

                                        7PAGE
<PAGE>
        as described in Sections 555 and 559 of Title 11 of the United
        States Code, as amended.

             IN WITNESS WHEREOF, the parties have executed this Agreement
        as of December 28, 1996.


        THERMO ELECTRON CORPORATION        THERMO BIOANALYSIS CORPORATION


        By:   Jonathan W. Painter          By:    Barry S. Howe

        Name:     Jonathan W. Painter      Name:      Barry S. Howe

        Title:    Treasurer                Title:     President 


                                        8

                                                         Exhibit 10.20
                         THERMO BIOANALYSIS CORPORATION

                     RESTATED STOCK HOLDING ASSISTANCE PLAN


        SECTION 1.   Purpose.

             The purpose of this Plan is to benefit Thermo BioAnalysis
        Corporation (the "Company") and its stockholders by encouraging
        Key Employees to acquire and maintain share ownership in the
        Company, by increasing such employees' proprietary interest in
        promoting the growth and performance of the Company and its
        subsidiaries and by providing for the implementation of the Stock
        Holding Policy.  

        SECTION 2.     Definitions.

             The following terms, when used in the Plan, shall have the
        meanings set forth below:

             Committee:   The Human Resources Committee of the Board of
        Directors of the Company as appointed from time to time.

             Common Stock:   The common stock of the Company and any
        successor thereto.

             Company:   Thermo BioAnalysis Corporation, a Delaware
        corporation.

             Stock Holding Policy:   The Stock Holding Policy of the
        Company, as adopted by the Committee and as in effect from time
        to time.

             Key Employee:   Any employee of the Company or any of its
        subsidiaries, including any officer or member of the Board of
        Directors who is also an employee, as designated by the
        Committee, and who, in the judgment of the Committee, will be in
        a position to contribute significantly to the attainment of the
        Company's strategic goals and long-term growth and prosperity.

             Loans:   Loans extended to Key Employees by the Company
        pursuant to this Plan.

             Plan:   The Thermo BioAnalysis Corporation Stock Holding
        Assistance Plan, as amended from time to time.

        SECTION 3.     Administration.

             The Plan and the Stock Holding Policy shall be administered
        by the Committee, which shall have authority to interpret the
        Plan and the Stock Holding Policy and, subject to their
        provisions, to prescribe, amend and rescind any rules and
        regulations and to make all other determinations necessary or
        desirable for the administration thereof.  The Committee's
PAGE
<PAGE>
        interpretations and decisions with regard to the Plan and the
        Stock Holding Policy and such rules and regulations as may be
        established thereunder shall be final and conclusive.  The
        Committee may correct any defect or supply any omission or
        reconcile any inconsistency in the Plan or the Stock Holding
        Policy, or in any Loan in the manner and to the extent the
        Committee deems desirable to carry it into effect.  No member of
        the Committee shall be liable for any action or omission in
        connection with the Plan or the Stock Holding Policy that is made
        in good faith.

        SECTION 4.     Loans and Loan Limits.

             The Committee has determined that the provision of Loans
        from time to time to Key Employees in such amounts as to cause
        such Key Employees to comply with the Stock Holding Policy is, in
        the judgment of the Committee, reasonably expected to benefit the
        Company and authorizes the Company to extend Loans from time to
        time to Key Employees in such amounts as may be requested by such
        Key Employees in order to comply with the Stock Holding Policy.
        Such Loans may be used solely for the purpose of acquiring Common
        Stock (other than upon the exercise of stock options or under
        employee stock purchase plans) in open market transactions or
        from the Company.

             Each Loan shall be full recourse and evidenced by a
        non-interest bearing promissory note substantially in the form
        attached hereto as Exhibit A (the "Note") and maturing in
        accordance with the provisions of Section 6 hereof, and
        containing such other terms and conditions, which are not
        inconsistent with the provisions of the Plan and the Stock
        Holding Policy, as the Committee shall determine in its sole and
        absolute discretion.

        SECTION 5.     Federal Income Tax Treatment of Loans.

             For federal income tax purposes, interest on Loans shall be
        imputed on any interest free Loan extended under the Plan.  A Key
        Employee shall be deemed to have paid the imputed interest to the
        Company and the Company shall be deemed to have paid said imputed
        interest back to the Key Employee as additional compensation.
        The deemed interest payment shall be taxable to the Company as
        income, and may be deductible to the Key Employee to the extent
        allowable under the rules relating to investment interest.  The
        deemed compensation payment to the Key Employee shall be taxable
        to the employee and deductible to the Company, but shall also be
        subject to employment taxes such as FICA and FUTA.

        SECTION 6.     Maturity of Loans.

             Each Loan to a Key Employee hereunder shall be due and
        payable on demand by the Company.  If no such demand is made,
        then each Loan shall mature and the principal thereof shall
        become due and payable in five equal annual installments from the

                                        2PAGE
<PAGE>
        payment of annual cash incentive compensation (referred to as
        bonus) to the Key Employee by the Company, beginning with the
        first such bonus payment to occur after the date of the Note
        evidencing the Loan, and on each of the next four bonus payment
        dates, provided that the Committee may, in its sole and absolute
        discretion, authorize such other maturity and repayment schedule
        as the Committee may determine.  Each Loan shall also become
        immediately due and payable in full, without demand, upon  the
        occurrence of any of the events set forth in the Note; provided
        that the Committee may, in its sole and absolute discretion,
        authorize an extension of the time for repayment of a Loan upon
        such terms and conditions as the Committee may determine.

        SECTION 7.     Amendment and Termination of the Plan.

             The Committee may from time to time alter or amend the Plan
        or the Stock Holding Policy in any respect, or terminate the Plan
        or the Stock Holding Policy at any time.  No such amendment or
        termination, however, shall alter or otherwise affect the terms
        and conditions of any Loan then outstanding to Key Employee
        without such Key Employee's written consent, except as otherwise
        provided herein or in the promissory note evidencing such Loan.

        SECTION 8.     Miscellaneous Provisions.

             (a)  No employee or other person shall have any claim or
        right to receive a Loan under the Plan, and no employee shall
        have any right to be retained in the employ of the Company due to
        his or her participation in the Plan.

             (b)  No Loan shall be made hereunder unless counsel for the
        Company shall be satisfied that such Loan will be in compliance
        with applicable federal, state and local laws.

             (c)  The expenses of the Plan shall be borne by the Company.

             (d)  The Plan shall be unfunded, and the Company shall not
        be required to establish any special or separate fund or to make
        any other segregation of assets to assure the making of any Loan
        under the Plan.

             (e)  Except as otherwise provided in Section 7 hereof, by
        accepting any Loan under the Plan, each Key Employee shall be
        conclusively deemed to have indicated his acceptance and
        ratification of, and consent to, any action taken under the Plan
        or the Stock Holding Policy by the Company, the Board of
        Directors of the Company or the Committee.

             (f)  The appropriate officers of the Company shall cause to
        be filed any reports, returns or other information regarding
        Loans hereunder, as may be required by any applicable statute,
        rule or regulation.

        SECTION 9.     Effective Date.

                                        3PAGE
<PAGE>
             The Plan and the Stock Holding Policy shall become effective
        upon approval and adoption by the Committee.















                                        4PAGE
<PAGE>
                               EXHIBIT A TO STOCK HOLDING ASSISTANCE PLAN


                         THERMO BIOANALYSIS CORPORATION

                                 Promissory Note



        $_________                                                       
                                                Dated:____________


             For value received, ________________, an individual whose
        residence is located at _______________________ (the "Employee"),
        hereby promises to pay to Thermo BioAnalysis Corporation (the
        "Company"), or assigns, ON DEMAND, but in any case on or before
        [insert date which is the fifth anniversary of date of issuance]
        (the "Maturity Date"), the principal sum of [loan amount in
        words] ($_______), or such part thereof as then remains unpaid,
        without interest.  Principal shall be payable in lawful money of
        the United States of America, in immediately available funds, at
        the principal office of the Company or at such other place as the
        Company may designate from time to time in writing to the
        Employee. 

              Unless the Company has already made a demand for payment in
        full of this Note, the Employee agrees to repay the Company  an
        amount equal to 20% of the initial principal amount of the Note
        from the payment of annual cash incentive compensation (referred
        to as bonus) to the Employee by the Company, beginning with the
        first such bonus payment to occur after the date of this Note,
        and on each of the next four bonus payment dates.  Any amount
        remaining unpaid under this Note, if no demand has been made by
        the Company, shall be due and payable on the Maturity Date.

             This Note may be prepaid at any time or from time to time,
        in whole or in part, without any premium or penalty.  The
        Employee acknowledges and agrees that the Company has advanced to
        the Employee the principal amount of this Note pursuant to the
        Company's Stock Holding Assistance Plan, and that all terms and
        conditions of such Plan are incorporated herein by reference.  

             The unpaid principal amount of this Note shall be and become
        immediately due and payable without notice or demand, at the
        option of the Company, upon the occurrence of any of the
        following events:

                  (a)  the termination of the Employee's employment with
        the Company, with or without cause, for any reason or for no
        reason;

                  (b)  the death or disability of the Employee;

                                        5PAGE
<PAGE>
                  (c)  the failure of the Employee to pay his or her
        debts as they become due, the insolvency of the Employee, the
        filing by or against the Employee of any petition under the
        United States Bankruptcy Code (or the filing of any similar
        petition under the insolvency law of any jurisdiction), or the
        making by the Employee of an assignment or trust mortgage for the
        benefit of creditors or the appointment of a receiver, custodian
        or similar agent with respect to, or the taking by any such
        person of possession of, any property of the Employee; or

                  (d)  the issuance of any writ of attachment, by trustee
        process or otherwise, or any restraining order or injunction not
        removed, repealed or dismissed within thirty (30) days of
        issuance, against or affecting the person or property of the
        Employee or any liability or obligation of the Employee to the
        Company.

             In case any payment herein provided for shall not be paid
        when due, the Employee further promises to pay all costs of
        collection, including all reasonable attorneys' fees.

             No delay or omission on the part of the Company in
        exercising any right hereunder shall operate as a waiver of such
        right or of any other right of the Company, nor shall any delay,
        omission or waiver on any one occasion be deemed a bar to or
        waiver of the same or any other right on any future occasion.
        The Employee hereby waives presentment, demand, notice of
        prepayment, protest and all other demands and notices in
        connection with the delivery, acceptance, performance, default or
        enforcement of this Note.  The undersigned hereby assents to any
        indulgence and any extension of time for payment of any
        indebtedness evidenced hereby granted or permitted by the
        Company.  

             This Note has been made pursuant to the Company's Stock
        Holding Assistance Plan and shall be governed by and construed in
        accordance with, such Plan and the laws of the State of Delaware
        and shall have the effect of a sealed instrument.


                                      _______________________________

                                      Employee Name: _________________


        ________________________
        Witness





                                                                    Exhibit 11


                        THERMO BIOANALYSIS CORPORATION

                       Computation of Earnings per Share


                                                                             
                                                    Year Ended
                                       -------------------------------------
                                          Dec. 28,    Dec. 30,      Dec. 31,
                                              1996        1995          1994
  --------------------------------------------------------------------------
  Computation of Primary
    Earnings (Loss) per Share:

  Net Income (Loss) (a)                $  (436,000)$ 2,514,000  $ 2,400,000

  Shares:
    Weighted average
      shares outstanding                 8,542,324   7,693,637    6,500,000

    Add: Shares issuable
         from assumed
         exercise of 
         options (as 
         determined by
         the application
         of the treasury
         stock method)                      58,725     117,450      117,450
                                       ----------- -----------  -----------
    Weighted average
      shares outstanding,
      as adjusted (b)                    8,601,049   7,811,087    6,617,450
                                       ----------- -----------  -----------
  Primary Earnings (Loss)
    per Share (a) / (b)                $      (.05)$       .32  $       .36
                                       =========== ===========  ===========



                                                                   Exhibit 13






















                         THERMO BIOANALYSIS CORPORATION

                        Consolidated Financial Statements

                                      1996
PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                      Consolidated Statement of Operations

    (In thousands except per share amounts)        1996      1995      1994
    -----------------------------------------------------------------------
    Revenues (Notes 6 and 8)                    $71,649   $22,534   $25,127
                                                -------   -------   -------

    Costs and Operating Expenses:
      Cost of revenues (Note 6)                  37,807    13,036    14,176
      Selling, general, and administrative
        expenses (Note 6)                        20,987     4,804     5,054
      Research and development expenses           7,298     1,325     2,042
      Write-off of acquired technology
        (Note 2)                                  3,500         -         -
                                                -------   -------   -------
                                                 69,592    19,165    21,272
                                                -------   -------   -------

    Operating Income                              2,057     3,369     3,855

    Interest Income                               1,280       819         -
    Interest Expense, Related Party (Note 6)     (1,873)        -         -
                                                -------   -------   -------
    Income Before Provision for Income Taxes      1,464     4,188     3,855
    Provision for Income Taxes (Note 4)           1,900     1,674     1,455
                                                -------   -------   -------
    Net Income (Loss)                           $  (436)  $ 2,514   $ 2,400
                                                =======   =======   =======
    Earnings (Loss) per Share                   $  (.05)  $   .32   $   .36
                                                =======   =======   =======
    Weighted Average Shares                       8,601     7,811     6,617
                                                =======   =======   =======


    The accompanying notes are an integral part of these consolidated
    financial statements.





                                         2PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                           Consolidated Balance Sheet

    (In thousands except share amounts)                     1996        1995
    ------------------------------------------------------------------------
    Assets
    Current Assets:
      Cash and cash equivalents                         $ 45,476    $ 17,747
      Accounts receivable, less allowances of
        $991 and $154                                     17,265       5,482
      Inventories                                         14,592       5,968
      Prepaid income taxes (Note 4)                        2,319         673
      Prepaid expenses                                       618           7
      Due from parent company and affiliates                 965         761
                                                        --------    --------
                                                          81,235      30,638
                                                        --------    --------
    Property, Plant, and Equipment, at Cost, Net           5,547       1,654
                                                        --------    --------
    Other Assets                                           3,098         195
                                                        --------    --------
    Cost in Excess of Net Assets of Acquired
      Companies (Note 2)                                  33,117         420
                                                        --------    --------
                                                        $122,997    $ 32,907
                                                        ========    ========
    Liabilities and Shareholders' Investment
    Current Liabilities:
      Accounts payable                                  $  4,282    $    432
      Accrued payroll and employee benefits                2,616         692
      Accrued income taxes                                 2,775       1,665
      Other accrued expenses (Note 2)                      7,651         744
      Deferred revenue                                     4,161           -
                                                        --------    --------
                                                          21,485       3,533
                                                        --------    --------
    Deferred Income Taxes (Note 4)                           196         228
                                                        --------    --------
    Subordinated Convertible Note, Due to
      Parent Company (Note 6)                             50,000           -
                                                        --------    --------
    Commitments (Note 5)

    Shareholders' Investment (Notes 3 and 7):
      Common stock, $.01 par value, 25,000,000 shares
        authorized; 9,771,500 and 8,101,500 shares
        issued and outstanding                                98          81
      Capital in excess of par value                      47,882      26,917
      Retained earnings                                    1,707       2,143
      Cumulative translation adjustment                    1,629           5
                                                        --------    --------
                                                          51,316      29,146
                                                        --------    --------
                                                        $122,997    $ 32,907
                                                        ========    ========
    The accompanying notes are an integral part of these consolidated
    financial statements.
                                         3PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                      Consolidated Statement of Cash Flows

    (In thousands)                                1996       1995       1994
    ------------------------------------------------------------------------
    Operating Activities:
      Net income (loss)                      $   (436)   $  2,514   $  2,400
      Adjustments to reconcile net income
        (loss) to net cash provided by
        operating activities:
          Depreciation and amortization         3,002         346        289
          Provision for losses on accounts
            receivable                            210           -         15
          Deferred income tax expense
            (benefit)                              10         (60)       279
          Write-off of acquired technology
            (Note 2)                            3,500           -          -
          Changes in current accounts,
            excluding the effects of
            acquisitions:
              Accounts receivable              (2,091)        388        269
              Inventories                         548        (303)    (1,265)
              Other current assets                817        (698)       (78)
              Accounts payable                  1,706        (384)      (610)
              Other current liabilities         1,323         (41)      (540)
          Other                                    34           -          -
                                             --------    --------   --------
    Net cash provided by operating
      activities                                8,623       1,762        759
                                             --------    --------   --------

    Investing Activities:
      Acquisitions, net of cash acquired
        (Note 2)                              (50,698)          -          -
      Purchases of property, plant, and
        equipment                              (1,476)       (313)      (237)
      Other                                         -        (183)         -
                                             --------    --------   --------
    Net cash used in investing activities    $(52,174)   $   (496)  $   (237)
                                             --------    --------   --------



                                         4PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                Consolidated Statement of Cash Flows (continued)

    (In thousands)                                1996       1995       1994
    ------------------------------------------------------------------------
    Financing Activities:
      Net proceeds from issuance of Company
        common stock (Note 7)                $ 20,782   $ 14,918    $      -
      Proceeds from issuance of subordinated
        convertible note to parent company
        (Note 6)                               50,000          -           -
      Proceeds from issuance of note payable
        to Thermo Electron (Note 6)            30,000          -           -
      Repayment of note payable to Thermo
        Electron (Note 6)                     (30,000)         -           -
      Transfer from parent company to fund
        income tax payments                         -      1,930       1,670
      Net transfer to parent company                -       (383)     (2,185)
      Other                                        58          -           -
                                             --------   --------    --------
    Net cash provided by (used in)
      financing activities                     70,840     16,465        (515)
                                             --------   --------    --------
    Exchange Rate Effect on Cash                  440         (5)          -
                                             --------   --------    --------
    Increase in Cash and Cash Equivalents      27,729     17,726           7
    Cash and Cash Equivalents at Beginning
      of Year                                  17,747         21          14
                                             --------   --------    --------
    Cash and Cash Equivalents at End
      of Year                                $ 45,476   $ 17,747    $     21
                                             ========   ========    ========

    Cash Paid For:
      Interest                               $  1,848   $      -    $      -
      Income taxes                           $    536   $  1,930    $  1,670

    Noncash Investing Activities:
      Fair value of assets of acquired
        companies                            $ 68,356   $      -    $      -
      Cash paid for acquired companies        (52,191)         -           -
                                             --------   --------    --------
        Liabilities assumed of acquired
          companies                          $ 16,165   $      -    $      -
                                             ========   ========    ========


    The accompanying notes are an integral part of these consolidated
    financial statements.

                                         5PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

               Consolidated Statement of Shareholders' Investment

    (In thousands)                           1996        1995        1994
    Common Stock, $.01 Par Value
      Balance at beginning of year       $     81    $      -    $      -
      Capitalization of Company                 -          65           -
      Net proceeds from issuance of
        Company common stock (Note 7)          17          16           -
                                         --------    --------    --------
      Balance at end of year                   98          81           -
                                         --------    --------    --------

    Capital in Excess of Par Value
      Balance at beginning of year         26,917           -           -
      Capitalization of Company                 -      12,015           -
      Net proceeds from issuance of
        Company common stock (Note 7)      20,765      14,902           -
      Tax benefit related to employees'
        and directors' stock plans            200           -           -
                                         --------    --------    --------
      Balance at end of year               47,882      26,917           -
                                         --------    --------    --------

    Retained Earnings
      Balance at beginning of year          2,143           -           -
      Net income (loss) after
        capitalization of Company            (436)      2,143           -
                                         --------    --------    --------
      Balance at end of year                1,707       2,143           -
                                         --------    --------    --------

    Cumulative Translation Adjustment
      Balance at beginning of year              5           -           -
      Translation adjustment                1,624           5           -
                                         --------    --------    --------
      Balance at end of year                1,629           5           -
                                         --------    --------    --------
    Net Parent Company Investment
      Balance at beginning of year              -      10,162       8,277
      Net income prior to
        capitalization of Company               -         371       2,400
      Net transfer (to) from parent
        company                                 -       1,547        (515)
      Capitalization of Company                 -     (12,080)          -
                                         --------    --------    --------
      Balance at end of year                    -           -      10,162
                                         --------    --------    --------
    Total Shareholders' Investment       $ 51,316    $ 29,146    $ 10,162
                                         ========    ========    ========


    The accompanying notes are an integral part of these consolidated
    financial statements.

                                         6PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies

    Nature of Operations
        Thermo BioAnalysis Corporation (the Company) designs, manufactures,
    and markets life sciences instrumentation, including instruments and
    consumables based on immunoassay, optical biosensor, mass spectrometry,
    and capillary electrophoresis (CE) technologies; information management
    systems including laboratory information management systems (LIMS) and
    chromatography data systems; and health physics instrumentation including
    radiation detection and counting instrumentation, and sophisticated
    radiation monitoring systems.

    Relationship With Thermo Instrument Systems Inc. and Thermo Electron
    Corporation
        The Company was incorporated in February 1995 as a wholly owned
    subsidiary of Thermo Instrument Systems Inc. (Thermo Instrument) at which
    time Thermo Instrument transferred to the Company the assets related to
    certain elements of its Thermo Separation Products Inc. CE product line,
    its Finnigan MAT Ltd. MALDI-TOF division, and its Eberline Instruments
    health physics instrumentation division in exchange for 6,500,000 shares
    of the Company's common stock. As of December 28, 1996, Thermo Instrument
    owned 6,500,000 shares of the Company's common stock, representing 67% of
    such stock outstanding. Thermo Instrument is an 82%-owned subsidiary of
    Thermo Electron Corporation (Thermo Electron). As of December 28, 1996,
    Thermo Electron owned 59,200 shares of the Company's common stock,
    representing .6% of such stock outstanding.

    Principles of Consolidation
        The accompanying financial statements include the accounts of the
    Company and its wholly owned subsidiaries. All material intercompany
    accounts and transactions have been eliminated.

    Fiscal Year
        The Company has adopted a fiscal year ending the Saturday nearest
    December 31. References to 1996, 1995, and 1994 are for the fiscal years
    ended December 28, 1996, December 30, 1995, and December 31, 1994,
    respectively.

    Revenue Recognition
        The Company recognizes revenue upon shipment of its products. The
    Company provides a reserve for its estimate of warranty and installation
    costs at the time of shipment. The Company recognizes revenue from
    service contracts over the respective terms of the contracts. Information
    management systems revenue is recognized upon execution of the license
    agreement and delivery of the software when any ongoing service
    commitments are not critical to the functionality of the software;
    otherwise revenue on both the service and software components is
    recognized based on long-term contract accounting. Revenue from software
    maintenance contracts, including amounts bundled in initial software
    licenses, is recognized ratably over the term of the contract. Deferred
    revenue in the accompanying 1996 balance sheet consists of unearned
    revenue on service contracts and maintenance contracts, which will be
    recognized within one year.

                                         7PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies
        (continued)

    Software Development Costs
        In accordance with Statement of Financial Accounting Standards (SFAS)
    No. 86, "Accounting for the Costs of Computer Software to be Sold,
    Leased, or Otherwise Marketed," software development costs are expensed
    as incurred until technological feasibility has been established. The
    Company believes that, under its current process for developing software,
    the software is essentially completed concurrently with the establishment
    of technological feasibility. Accordingly, no software development costs
    have been capitalized except for software recorded in connection with an
    acquisition (see "Other Assets").

    Stock-based Compensation Plans
        The Company applies Accounting Principles Board Opinion (APB) No. 25,
    "Accounting for Stock Issued to Employees" and related interpretations in
    accounting for its stock-based compensation plans (Note 3). Accordingly,
    no accounting recognition is given to stock options granted at fair
    market value until they are exercised. Upon exercise, net proceeds,
    including tax benefits realized, are credited to equity.

    Income Taxes
        In the period prior to the Company's initial public offering, the
    Company and Thermo Instrument were included in Thermo Electron's
    consolidated federal and certain state income tax returns. Subsequent to
    the Company's initial public offering in September 1996, Thermo
    Instrument's equity ownership of the Company was reduced below 80%, and
    as a result, the Company is required to file its own federal income tax
    return.
        In accordance with SFAS No. 109, "Accounting for Income Taxes," the
    Company recognizes deferred income taxes based on the expected future tax
    consequences of differences between the financial statement basis and the
    tax basis of assets and liabilities, calculated using enacted tax rates
    in effect for the year in which the differences are expected to be
    reflected in the tax return.

    Earnings per Share
        Earnings per share has  been computed based  on the weighted  average
    number of shares outstanding during the year.  Pursuant to Securities and
    Exchange Commission requirements, earnings  per share has been  presented
    for all periods.  Weighted average  shares for all  periods includes  the
    6,500,000 shares  issued  to Thermo  Instrument  in connection  with  the
    capitalization of the  Company and,  for periods prior  to the  Company's
    initial public  offering, the  effect of  the assumed  exercise of  stock
    options issued  within one  year prior  to the  Company's initial  public
    offering.     Because the effect  of the  assumed exercise of  stock options
    would be immaterial, they have been excluded from weighted average shares
    subsequent to  the  Company's  initial  public  offering.   Fully diluted
    earnings per  share  has  been computed,  where  dilutive,  assuming  the
    conversion of  the  Company's  subordinated  convertible  debentures  and
    elimination of the related interest expense,  as well as the exercise  of
    stock options and their related income tax effects (Note 9).
                                         8PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies
        (continued)

    Cash and Cash Equivalents
        As of December 28, 1996, $39,649,000 of the Company's cash
    equivalents were invested in a repurchase agreement with Thermo Electron.
    Under this agreement, the Company in effect lends excess cash to Thermo
    Electron, which Thermo Electron collateralizes with investments
    principally consisting of U.S. government agency securities, corporate
    notes, commercial paper, money market funds, and other marketable
    securities, in the amount of at least 103% of such obligation. The
    Company's funds subject to the repurchase agreement are readily
    convertible into cash by the Company. The repurchase agreement earns a
    rate based on the 90-day Commercial Paper Composite Rate plus 25 basis
    points, set at the beginning of each quarter. Cash equivalents are
    carried at cost, which approximates market value.

    Inventories
        Inventories are stated at the lower of cost (on a weighted average
    basis) or market value and include materials, labor, and manufacturing
    overhead. The components of inventories are as follows:

    (In thousands)                                         1996       1995
    ----------------------------------------------------------------------
    Raw materials and supplies                          $ 7,473    $ 3,501
    Work in process                                       1,064      1,127
    Finished goods                                        6,055      1,340
                                                        -------    -------

                                                        $14,592    $ 5,968
                                                        =======    =======

    Property, Plant, and Equipment
        The costs of additions and improvements are capitalized, while
    maintenance and repairs are charged to expense as incurred. The Company
    provides for depreciation and amortization using the straight-line method
    over the estimated useful lives of the property as follows: buildings and
    improvements, 15 years; machinery and equipment, 3 to 10 years; and
    leasehold improvements, the shorter of the term of the lease or the life
    of the asset. Property, plant, and equipment consists of the following:

    (In thousands)                                         1996       1995
    -----------------------------------------------------------------------
    Land                                                $   285    $   285
    Buildings                                             2,603      2,603
    Machinery, equipment, and leasehold improvements      9,241      3,429
                                                        -------    -------
                                                         12,129      6,317
    Less: Accumulated depreciation and amortization       6,582      4,663
                                                        -------    -------
                                                        $ 5,547    $ 1,654
                                                        =======    =======

                                         9PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies
        (continued)

    Other Assets
        Other assets in the accompanying balance sheet primarily represents
    the cost of acquired product technology and capitalized software
    associated with the 1996 acquisitions of the Affinity Sensors and
    LabSystems divisions of Fisons plc (Fisons) from Thermo Instrument (Note
    2). These assets are being amortized using the straight-line method over
    their estimated useful lives of 8 years. These assets were $2,997,000,
    net of accumulated amortization of $295,000, at year-end 1996.

    Cost in Excess of Net Assets of Acquired Companies
        The excess of cost over the fair value of net assets of acquired
    companies is amortized using the straight-line method over 40 years.
    Accumulated amortization was $1,010,000 and $302,000 at year-end 1996 and
    1995, respectively. The Company assesses the future useful life of this
    asset whenever events or changes in circumstances indicate that the
    current useful life has diminished. The Company considers the future
    undiscounted cash flows of the acquired companies in assessing the
    recoverability of this asset. If impairment has occurred, any excess of
    carrying value over fair value is recorded as a loss.

    Foreign Currency
        All assets and liabilities of the Company's foreign subsidiaries are
    translated at year-end exchange rates, and revenues and expenses are
    translated at average exchange rates for the year in accordance with SFAS
    No. 52, "Foreign Currency Translation." Resulting translation adjustments
    are reflected as a separate component of shareholders' investment titled
    "Cumulative translation adjustment." Foreign currency transaction gains
    and losses are included in the accompanying statement of operations and
    are not material for the three years presented.

    Fair Value of Financial Instruments
        The Company's financial instruments consist primarily of cash and
    cash equivalents, accounts receivable, due from parent company and
    affiliates, accounts payable, and a subordinated convertible note. The
    carrying amounts of these financial instruments, with the exception of
    the subordinated convertible note, approximate fair value due to their
    short-term nature. See Note 6 for fair value information pertaining to
    the Company's subordinated convertible note.

    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 assets and liabilities,
    disclosure of contingent assets and liabilities at the date of the
    financial statements, and the reported amounts of revenues and expenses
    during the reporting period. Actual results could differ from those
    estimates.

                                        10PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                   Notes to Consolidated Financial Statements

    2.  Acquisitions

        In February 1996, the Company acquired substantially all of the
    assets, subject to certain liabilities, of the DYNEX Technologies (DYNEX)
    division of Dynatech Corporation for $43,191,000 in cash. DYNEX designs,
    manufactures, and markets products used in the immunoassay segment of the
    bioinstrumentation market. This acquisition has been accounted for using
    the purchase method of accounting, and DYNEX's results have been included
    in the accompanying financial statements from the date of acquisition.
    The cost of DYNEX exceeded the estimated fair value of the acquired net
    assets by $32,740,000, which is being amortized over 40 years.
        On March 29, 1996, Thermo Instrument acquired a substantial portion
    of the businesses comprising the Scientific Instruments Division of
    Fisons, a wholly owned subsidiary of Rhone-Poulenc Rorer Inc. In July
    1996, the Company acquired from Thermo Instrument two businesses formerly
    part of Fisons, Affinity Sensors and LabSystems, for an aggregate
    purchase price of $9,000,000 in cash, subject to a post-closing
    adjustment based on a post-closing adjustment to be negotiated with
    Fisons by Thermo Instrument in connection with the settlement of the
    final purchase price for all of the businesses of Fisons acquired by
    Thermo Instrument in March 1996. Affinity Sensors supplies biosensors
    used in life sciences research by the pharmaceutical and biotechnology
    industries, universities, and medical research institutes. LabSystems
    designs, implements, and supports laboratory information management
    systems and chromatography data systems used in research and development,
    quality assurance and control, and processing plants. Because the
    Company, Affinity Sensors, and LabSystems were deemed for accounting
    purposes to be under control of their common majority owner, Thermo
    Instrument, the transaction has been accounted for in a manner similar to
    a pooling of interests. Accordingly, the Company's 1996 financial
    statements include the results of Affinity Sensors and LabSystems from
    March 29, 1996, the date these businesses were acquired by Thermo
    Instrument. The acquired assets of Affinity Sensors and LabSystems
    included certain technologies for which technological feasibility had not
    been established at the acquisition date and which had no alternative
    future use. In connection with the acquisitions, the Company wrote off
    such technology in the amount of $3,500,000, which represents the portion
    of the purchase price allocated to technology in development at the
    acquired businesses, based on estimated replacement cost.
        Based on unaudited data, the following table presents selected
    financial information for the Company, DYNEX, Affinity Sensors, and
    LabSystems on a pro forma basis, assuming the companies had been combined
    since the beginning of 1995.

    (In thousands except per share amounts)                1996        1995
    -----------------------------------------------------------------------
    Revenues                                            $78,837     $80,803
    Net income                                              570         822
    Earnings per share                                      .07         .11

        The pro forma results are not necessarily indicative of future
    operations or the actual results that would have occurred had the

                                        11PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                   Notes to Consolidated Financial Statements

    2.  Acquisitions (continued)

    acquisitions of DYNEX, Affinity Sensors, and LabSystems been made at the
    beginning of 1995.
        In connection with the acquisition of DYNEX, the Company has
    undertaken a restructuring of the acquired business. The restructuring
    activities include reductions in staffing levels, abandonment of excess
    facilities, and other costs associated with exiting certain activities of
    the acquired business. In connection with these restructuring activities,
    the Company established reserves of $2,259,000. These amounts were
    recorded as costs of the acquisition and were provided in accordance with
    Emerging Issues Task Force Pronouncement 95-3 (EITF 95-3). During 1996,
    the Company expended $915,000 for restructuring costs. These expenditures
    consisted primarily of severance payments and lease termination fees. The
    Company finalized its restructuring plan for DYNEX as of year-end 1996,
    and had a remaining reserve balance for DYNEX's restructuring of
    $1,344,000 related to ongoing severance and abandoned facility payments.
    As of December 28, 1996, the Company had accrued a total of $1,741,000
    for restructuring costs for all of its acquisitions, which is included in
    other accrued expenses in the accompanying balance sheet.

    3.  Employee Benefit Plans

    Stock-based Compensation Plans

    Stock Option Plans
    ------------------
        In February 1995, the Company adopted a stock-based compensation plan
    for its key employees, directors, and others, which permits the grant of
    a variety of stock and stock-based awards as determined by the human
    resources committee of the Company's Board of Directors (the Board
    Committee), including restricted stock, stock options, stock bonus
    shares, or performance-based shares. The option recipients and the terms
    of options granted under this plan are determined by the Board Committee.
    Options granted to date became exercisable in December 1996, but are
    subject to certain transfer restrictions and the right of the Company to
    repurchase shares issued upon exercise of the options at the exercise
    price, upon certain events. The restrictions and repurchase rights
    generally lapse ratably over a five to ten year period, depending on the
    term of the option, which generally ranges from ten to twelve years.
    Nonqualified stock options may be granted at any price determined by the
    Board Committee, although incentive stock options must be granted at not
    less than the fair market value of the Company's stock on the date of
    grant. To date, all options have been granted at fair market value. The
    Company also has a directors' stock option plan, adopted in November
    1995, that provides for the grant of stock options to outside directors
    pursuant to a formula approved by the Company's shareholders. Options
    granted under this plan have the same general terms as options granted to
    date under the stock-based compensation plan described above, except that
    the option term is five years and the transfer restrictions and
    repurchase rights generally lapse ratably over a four-year period. In
    addition to the Company's stock-based compensation plans, certain
    officers and key employees may also participate in the stock-based
    compensation plans of Thermo Instrument and Thermo Electron.
                                        12PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                   Notes to Consolidated Financial Statements

    3.  Employee Benefit Plans (continued)

    Employee Stock Purchase Program
    -------------------------------
        Substantially all of the Company's full-time U.S. employees are
    eligible to participate in an employee stock purchase program sponsored
    by Thermo Instrument and Thermo Electron. Under this program, shares of
    Thermo Instrument's and Thermo Electron's common stock can be purchased
    at the end of a 12-month period at 95% of the fair market value at the
    beginning of the period, and the shares purchased are subject to a
    six-month resale restriction. Prior to November 1, 1995, the applicable
    shares of common stock could be purchased at 85% of the fair market value
    at the beginning of the period, and the shares purchased were subject to
    a one-year resale restriction. Shares are purchased through payroll
    deductions of up to 10% of each participating employee's gross wages.

    Pro Forma Stock-based Compensation Expense
         In October 1995, the Financial Accounting Standards Board issued
    SFAS No. 123, "Accounting for Stock-based Compensation," which sets forth
    a fair-value based method of recognizing stock-based compensation
    expense. As permitted by SFAS No. 123, the Company has elected to
    continue to apply APB No. 25 to account for its stock-based compensation
    plans. Had compensation cost for awards in 1996 and 1995 under the
    Company's stock-based compensation plans been determined based on the
    fair value at the grant dates consistent with the method set forth under
    SFAS No. 123, the effect on the Company's net income (loss) and earnings
    (loss) per share would have been as follows:

    (In thousands except per share amounts)                1996         1995
    ------------------------------------------------------------------------
    Net income (loss):
      As reported                                       $ (436)      $2,514
      Pro forma                                           (863)       2,477
    Earnings (loss) per share:
      As reported                                         (.05)         .32
      Pro forma                                           (.10)         .32

        Pro forma compensation expense for options granted is reflected over
    the vesting period; therefore, future pro forma compensation expense may
    be greater as additional options are granted.
        The fair value of each option grant was estimated on the grant date
    using the Black-Scholes option-pricing model with the following
    weighted-average assumptions:

                                                          1996         1995
    -----------------------------------------------------------------------
    Volatility                                             26%          26%
    Risk-free interest rate                               6.2%         6.5%
    Expected life of options                         8.1 years    3.5 years

                                        13PAGE
<PAGE>
   Thermo BioAnalysis Corporation                    1996 Financial Statements

                   Notes to Consolidated Financial Statements

   3.  Employee Benefit Plans (continued)

       The Black-Scholes option-pricing model was developed for use in
   estimating the fair value of traded options that have no vesting
   restrictions and are fully transferable. In addition, option-pricing models
   require the input of highly subjective assumptions, including expected
   stock price volatility. Because the Company's employee stock options have
   characteristics significantly different from those of traded options, and
   because changes in the subjective input assumptions can materially affect
   the fair value estimate, in management's opinion, the existing models do
   not necessarily provide a reliable single measure of the fair value of its
   employee stock options.

   Stock Option Activity
      A summary of the Company's stock option activity is as follows:
                                                1996               1995
                                          ----------------  -----------------
                                                  Weighted           Weighted
                                          Number   Average  Number    Average
                                              of  Exercise      of   Exercise
   (Shares in thousands)                  Shares     Price  Shares      Price
   --------------------------------------------------------------------------
   Options outstanding,
     beginning of year                        30   $10.00        -   $    -

       Granted                               713    11.28       30    10.00

       Forfeited                             (26)   10.00        -        -
                                           -----             -----
   Options outstanding,
     end of year                             717   $11.27       30   $10.00
                                           =====   ======    =====   ======
   Options exercisable                       717   $11.27        -   $    -
                                           =====   ======    =====   ======
   Options available
     for grant                               183                70
                                           =====             =====
   Weighted average fair
     value per share of
     options granted
     during year                                   $ 5.36            $ 2.93
                                                   ======            ======

      As of December 28, 1996, the options outstanding were exercisable at
   prices ranging from $10.00 to $13.63 and had a weighted-average remaining
   contractual life of 10.4 years.

   401(k) Savings Plan and Employee Stock Ownership Plan
       Substantially all of the Company's full-time U.S. employees are
   eligible to participate in Thermo Electron's 401(k) savings plan and, prior
   to 1995, in Thermo Electron's employee stock ownership plan (ESOP).
   Contributions to the 401(k) savings plan are made by both the employee and
   the Company. Company contributions are based upon the level of employee

                                       14PAGE
<PAGE>
   Thermo BioAnalysis Corporation                    1996 Financial Statements

                   Notes to Consolidated Financial Statements

   3.  Employee Benefit Plans (continued)

   contributions. For these plans, the Company contributed and charged to
   expense $285,000, $128,000, and $169,000 in 1996, 1995, and 1994,
   respectively. Effective December 31, 1994, the ESOP was split into two
   plans: ESOP I, covering employees of Thermo Electron's corporate office and
   its wholly owned subsidiaries and ESOP II, covering employees of certain of
   Thermo Electron's majority-owned subsidiaries, including the Company.
   Effective December 31, 1994, the ESOP II plan was terminated and as a
   result, the Company's employees are no longer eligible to participate in an
   ESOP.

   4. Income Taxes

       The components of income before provision for income taxes are as
   follows:

   (In thousands)                                 1996      1995      1994
   -----------------------------------------------------------------------
   Domestic                                    $ 1,786   $ 3,828   $ 3,684
   Foreign                                        (322)      360       171
                                               -------   -------   -------
                                               $ 1,464   $ 4,188   $ 3,855
                                               =======   =======   =======

       The components of the provision for income taxes are as follows:

   (In thousands)                                 1996      1995      1994
   -----------------------------------------------------------------------
   Currently payable:
     Federal                                   $   487   $ 1,331   $   939
     State                                          93       284       237
     Foreign                                     1,310       119         -
                                               -------   -------   -------
                                                 1,890     1,734     1,176
                                               -------   -------   -------
   Net deferred (prepaid):
     Federal                                         8       (50)      231
     State                                           2       (10)       48
                                               -------   -------   -------
                                                    10       (60)      279
                                               -------   -------   -------
                                               $ 1,900   $ 1,674   $ 1,455
                                               =======   =======   =======

       The Company receives a tax deduction upon exercise of nonqualified
   stock options by employees for the difference between the exercise price
   and the market price of the underlying common stock on the date of
   exercise. The provision for income taxes that is currently payable does not
   reflect $200,000 of such benefits that have been allocated to capital in
   excess of par value in 1996 resulting from employee exercises of stock
   options in affiliated companies.


                                       15PAGE
<PAGE>
   Thermo BioAnalysis Corporation                    1996 Financial Statements

                   Notes to Consolidated Financial Statements

   4. Income Taxes (continued)

       The provision for income taxes in the accompanying statement of
   operations differs from the provision calculated by applying the statutory
   federal income tax rate of 34% in 1996 and 35% in 1995 and 1994 to income
   before provision for income taxes due to the following:

   (In thousands)                                1996      1995      1994
   ----------------------------------------------------------------------
   Provision for income taxes at
     statutory rate                            $  498    $1,466    $1,349
   Increases (decreases) resulting from:
     State income taxes, net of federal tax        63       178       185
     Net foreign losses not benefited and
       tax rate differential                      229        (7)      (60)
     Tax benefit of foreign sales corporation     (23)       (6)      (34)
     Write-off of acquired technology (Note 2)  1,190         -         -
     Amortization of cost in excess of net
       assets of acquired companies                 6         6         6
     Other, net                                   (63)       37         9
                                               ------    ------    ------
                                               $1,900    $1,674    $1,455
                                               ======    ======    ======

        Prepaid income taxes and deferred income taxes in the accompanying
   balance sheet consist of the following:

   (In thousands)                                  1996      1995
   --------------------------------------------------------------
   Prepaid income taxes:
     Reserves and accruals                      $1,872    $  355
     Inventory basis difference                    370       256
     Allowance for doubtful accounts                77        62
                                                ------    ------
                                                $2,319    $  673
                                                ======    ======
   Deferred income taxes:
     Depreciation                               $  196    $  228
                                                ======    ======

       A provision has not been made for U.S. or additional foreign taxes on
   $2,246,000 of undistributed earnings in foreign subsidiaries that could be
   subject to taxation if remitted to the U.S. because the Company currently
   plans to keep these amounts permanently reinvested overseas. The Company
   believes that any additional U.S. tax liability due upon remittance of such
   earnings would be immaterial.


                                       16PAGE
<PAGE>
   Thermo BioAnalysis Corporation                    1996 Financial Statements

                   Notes to Consolidated Financial Statements

   5.  Commitments

      The Company leases portions of its office and operating facilities
   under various noncancellable operating lease arrangements that expire at
   various dates through 2015. The accompanying statement of operations
   includes expenses from operating leases of $1,401,000, $69,000, and $71,000
   in 1996, 1995, and 1994, respectively. Future minimum payments due under
   noncancellable operating leases as of December 28, 1996, are $1,561,000 in
   1997; $1,421,000 in 1998; $1,368,000 in 1999; $1,360,000 in 2000; $982,000
   in 2001; and $6,255,000 in 2002 and thereafter. Total future minimum lease
   payments are $12,947,000.

   6. Related Party Transactions

   Corporate Services Agreement
      The Company and Thermo Electron have a corporate services agreement
   under which Thermo Electron's corporate staff provides certain
   administrative services, including certain legal advice and services, risk
   management, certain employee benefit administration, tax advice and
   preparation of tax returns, centralized cash management, and certain
   financial and other services, for which the Company pays Thermo Electron
   annually an amount equal to 1.0% of the Company's revenues. The Company
   paid an annual fee equal to 1.20% and 1.25% of the Company's revenues in
   1995 and 1994, respectively. The annual fee is reviewed and adjusted
   annually by mutual agreement of the parties. For these services, the
   Company was charged $716,000, $270,000, and $314,000 in 1996, 1995, and
   1994, respectively. The corporate services agreement is renewed annually
   but can be terminated upon 30 days' prior notice by the Company or upon the
   Company's withdrawal from the Thermo Electron Corporate Charter (the Thermo
   Electron Corporate Charter defines the relationship among Thermo Electron
   and its majority-owned subsidiaries). Management believes that the service
   fee charged by Thermo Electron is reasonable and that such fees are
   representative of the expenses the Company would have incurred on a
   stand-alone basis. For additional items such as employee benefit plans,
   insurance coverage, and other identifiable costs, Thermo Electron charges
   the Company based upon costs attributable to the Company.

   Other Related Party Transactions
      The Company purchases and sells products in the ordinary course of
   business with other companies associated with Thermo Electron. Sales of
   such products to affiliated companies totaled $2,078,000, $279,000, and
   $262,000 in 1996, 1995, and 1994, respectively. Purchases of products from
   such companies totaled $306,000, $414,000, and $413,000 in 1996, 1995, and
   1994, respectively.
      Prior to 1996, a majority-owned subsidiary of Thermo Instrument acted
   as a commission-based sales agent for certain of the Company's products.
   The Company paid $1,263,000 and $1,288,000 under this arrangement in 1995
   and 1994, respectively.
      In addition, a majority-owned subsidiary of Thermo Instrument assembles
   certain of the Company's products. For these services, the Company paid
   $704,000, $600,000, and $566,000 in 1996, 1995, and 1994, respectively.

                                       17PAGE
<PAGE>
   Thermo BioAnalysis Corporation                    1996 Financial Statements

                   Notes to Consolidated Financial Statements

   6.  Related Party Transactions (continued)

   Repurchase Agreement
      The Company invests excess cash in a repurchase agreement with Thermo
   Electron as discussed in Note 1.

   Short- and Long-term Obligations
       In July 1996, the Company issued to Thermo Instrument a $50,000,000
   principal amount 4.875% subordinated convertible note, due 2001,
   convertible into shares of the Company's common stock at $16.50 per share. 
   The fair value of the subordinated convertible note approximates its
   carrying amount based primarily on the quoted market price of the Company's
   common stock and prevailing market interest rates.
       In February 1996, the Company borrowed $30,000,000 from Thermo Electron
   pursuant to a promissory note due February 1997 and bearing interest at the
   90-day Commercial Paper Composite Rate plus 25 basis points, set at the
   beginning of each quarter. This note was repaid in July 1996 with proceeds
   from the $50,000,000 subordinated convertible note issued to Thermo
   Instrument.

   7.  Common Stock

       In September and October 1996, the Company sold 1,670,000 shares of its
   common stock in an initial public offering at $14.00 per share for net
   proceeds of $20,782,000.
       In March 1995, the Company sold 700,000 shares of its common stock in a
   private placement at $10.00 per share for net proceeds of $6,530,000. In
   April 1995, the Company sold 901,500 shares of its common stock in a
   private placement for net proceeds of $8,388,000.
       At December 28, 1996, the Company had reserved 3,955,303 unissued
   shares of its common stock for possible issuance under stock-based
   compensation plans and for issuance upon possible conversion of the 4.875%
   subordinated convertible note.



                                       18PAGE
<PAGE>
   Thermo BioAnalysis Corporation                    1996 Financial Statements

                   Notes to Consolidated Financial Statements

   8.  Geographical Information and Significant Customer

       The following table shows data for the Company by geographical area.

   (In thousands)                                1996       1995       1994
   ------------------------------------------------------------------------
   Revenues:
     United States                          $ 43,098   $ 17,741    $ 19,891
     England                                  27,817      4,793       5,236
     Other Europe                             11,228          -           -
     Asia                                      3,381          -           -
     Transfers among geographical areas (a)  (13,875)         -           -
                                            --------   --------    --------
                                            $ 71,649   $ 22,534    $ 25,127
                                            ========   ========    ========
   Income before provision for income taxes:
     United States                          $  3,398   $  3,321    $  3,998
     England (b)                              (1,061)       360         171
     Other Europe                                621          -           -
     Asia                                        577          -           -
     Corporate and eliminations (c)           (1,478)      (312)       (314)
                                            --------   --------    --------
     Total operating income                    2,057      3,369       3,855
     Interest income (expense), net             (593)       819           -
                                            --------   --------    --------
                                            $  1,464   $  4,188    $  3,855
                                            ========   ========    ========
   Identifiable assets:
     United States                          $ 47,096   $ 29,022    $ 11,134
     England                                  27,720      3,885       3,215
     Other Europe                              6,467          -           -
     Asia                                      1,149          -           -
     Corporate (d)                            40,565          -           -
                                            --------   --------    --------
                                            $122,997   $ 32,907    $ 14,349
                                            ========   ========    ========
   Export revenues included in United States
     revenues above (e)                     $  3,432   $  2,741    $  3,217
                                            ========   ========    ========
   ____________________
   (a) Transfers among geographical areas are accounted for at prices that are
       representative of transactions with unaffiliated parties.
   (b) Includes a write-off of acquired technology in 1996 of $3,500,000
       related to the acquisitions of Affinity Sensors and LabSystems.
   (c) Primarily corporate general and administrative expenses.
   (d) Primarily cash and cash equivalents.
   (e) In general, export sales are denominated in U.S. dollars.

                                       19PAGE
<PAGE>
   Thermo BioAnalysis Corporation                    1996 Financial Statements

                   Notes to Consolidated Financial Statements

   8.  Geographical Information and Significant Customer (continued)

       No customer accounted for 10% or more of the Company's total revenues
   in 1996. U.S. government agencies accounted for 24% and 32% of the
   Company's total revenues in 1995 and 1994, respectively.

   9.  Unaudited Quarterly Information

   (In thousands except per share amounts)

   1996                           First(a)   Second       Third      Fourth
   ------------------------------------------------------------------------
   Revenues                     $10,911     $18,871     $19,346     $22,521
   Gross profit                   4,195       9,481       9,573      10,593
   Net income (loss)             (3,114)        431         787       1,460
   Earnings (loss) per share:
     Primary                       (.38)        .05         .10         .15
     Fully diluted                 (.38)        .05         .10         .14


   1995                           First      Second       Third      Fourth
   ------------------------------------------------------------------------
   Revenues                     $ 6,229     $ 5,457     $ 5,350     $ 5,498
   Gross profit                   2,540       2,320       2,266       2,372
   Net income                       603         704         631         576
   Earnings per share               .09         .09         .08         .07

   (a) Reflects the results of DYNEX since February 1996, and of Affinity
       Sensors and LabSystems since their acquisition by Thermo Instrument in
       March 1996, including the associated write-off of $3,500,000 of
       acquired technology.

                                       20PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                    Report Of Independent Public Accountants

    To the Shareholders and Board of Directors
    of Thermo BioAnalysis Corporation:

        We have audited the accompanying consolidated balance sheet of Thermo
    BioAnalysis Corporation (a Delaware corporation and 67%-owned subsidiary
    of Thermo Instrument Systems Inc.) and subsidiaries as of December 28,
    1996, and December 30, 1995, and the related consolidated statements of
    operations, cash flows, and shareholders' investment for each of the
    three years in the period ended December 28, 1996. These consolidated
    financial statements are the responsibility of the Company's management.
    Our responsibility is to express an opinion on these consolidated
    financial statements based on our audits.
        We conducted our audits in accordance with generally accepted
    auditing standards. Those standards require that we plan and perform the
    audit to obtain reasonable assurance about whether the consolidated
    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
    management, as well as evaluating the overall financial statement
    presentation. We believe that our audits provide a reasonable basis for
    our opinion.
        In our opinion, the consolidated financial statements referred to
    above present fairly, in all material respects, the financial position of
    Thermo BioAnalysis Corporation and subsidiaries as of December 28, 1996,
    and December 30, 1995, and the results of their operations and their cash
    flows for each of the three years in the period ended December 28, 1996,
    in conformity with generally accepted accounting principles.



                                                  Arthur Andersen LLP



    Boston, Massachusetts
    February 11, 1997



                                        21PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

        Forward-looking statements, within the meaning of Section 21E of the
    Securities Exchange Act of 1934, are made throughout this Management's
    Discussion and Analysis of Financial Condition and Results of Operations.
    For this purpose, any statements contained herein that are not statements
    of historical fact may be deemed to be forward-looking statements.
    Without limiting the foregoing, the words "believes," "anticipates,"
    "plans," "expects," "seeks," "estimates," and similar expressions are
    intended to identify forward-looking statements. There are a number of
    important factors that could cause the results of the Company to differ

    materially from those indicated by such forward-looking statements,
    including those detailed immediately after this Management's Discussion
    and Analysis of Financial Conditions and Results of Operations under the
    caption "Forward-looking Statements."

    Overview

        The Company has three principal product lines: life sciences
    instrumentation, information management systems, and health physics
    instrumentation. The Company's life sciences instrumentation group
    includes its DYNEX Technologies (DYNEX), Affinity Sensors, and MALDI-TOF
    mass spectrometer subsidiaries and its capillary electrophoresis (CE)
    division, through which the Company designs, manufactures, and markets a
    broad range of instruments and consumables based on proprietary
    immunoassay, optical biosensor, mass spectrometry, and CE technologies.
    The Company's LabSystems subsidiary designs, implements, and supports
    laboratory information management systems (LIMS) and chromatography data
    systems. The Company's Eberline health physics subsidiary supplies
    radiation detection and counting instrumentation and sophisticated
    radiation monitoring systems to the nuclear industry worldwide.
        The Company's strategy is to develop and market a portfolio of
    instruments and information management systems for biochemistry and other
    applications through research and development of innovative products and
    through the acquisition of complementary businesses and technologies. In
    February 1996, the Company acquired DYNEX, which supplies automated
    systems, detection systems, and consumables for the immunoassay market.
    Effective March 29, 1996, the Company acquired Affinity Sensors and
    LabSystems from Thermo Instrument Systems Inc. (Thermo Instrument) (Note
    2). Affinity Sensors supplies optical biosensors used in life sciences
    research by the pharmaceutical and biotechnology industries,
    universities, and medical research institutes. Affinity Sensors was
    established to develop and commercialize products based on a new
    technology, optical biosensors, and commenced commercial sales in 1993.
    LabSystems designs, implements, and supports LIMS and chromatography data
    systems used in research and development, quality assurance and control,
    and processing plants.

                                        22PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Results of Operations

    1996 Compared With 1995
        Revenues increased to $71.6 million in 1996 from $22.5 million in
    1995. This increase was primarily due to the inclusion of $33.1 million
    in revenues from DYNEX, acquired in February 1996, and the inclusion of
    $19.2 million in revenues from LabSystems and Affinity Sensors, which
    were acquired effective March 29, 1996 (Note 2), offset in part by lower
    revenues at the Company's MALDI-TOF subsidiary due to increased
    competition and a change in distribution channels from commission-based
    sales agents to distributors. In addition, the Company believes that
    revenues at the Company's Eberline health physics subsidiary decreased
    primarily due to reduced spending at U.S. Department of Energy facilities
    as a result of the federal budgetary impasse.
        The gross profit margin increased to 47% in 1996 from 42% in 1995,
    primarily due to the inclusion of higher-margin revenues at LabSystems
    and Affinity Sensors and, to a lesser extent, at DYNEX. These increases
    were offset in part by a decrease in margins at the Company's MALDI-TOF
    subsidiary, due to a change in distribution channels from commission-
    based sales agents to distributors, which resulted in reduced revenues.
        Selling, general, and administrative expenses as a percentage of
    revenues increased to 29% in 1996 from 21% in 1995, primarily due to
    higher costs as a percentage of revenues at DYNEX and, to a lesser
    extent, at LabSystems. In mid-1996 the Company implemented a cost
    reduction plan at DYNEX, which is intended to reduce selling, general,
    and administrative expenses as a percentage of revenues primarily by
    decreasing staffing levels and, to a lesser extent, travel and other
    related costs. Research and development expenses increased to $7.3
    million in 1996 from $1.3 million in 1995, primarily due to the inclusion
    of expenses at DYNEX, LabSystems, and Affinity Sensors.
        During 1996, the Company wrote off $3.5 million of acquired
    technology in connection with the acquisitions of Affinity Sensors and
    LabSystems (Note 2). 
        Interest income in both periods primarily represents interest earned
    on invested proceeds from the Company's private placements of common
    stock in March and April 1995, and initial public offering of common
    stock in September and October 1996. Interest expense, related party, in
    1996 represents interest associated with a $50.0 million principal amount
    subordinated convertible note issued to Thermo Instrument in July 1996
    and, to a lesser extent, interest associated with a $30.0 million
    promissory note issued to Thermo Electron Corporation (Thermo Electron)
    in February 1996, which was repaid in July 1996.
        The effective tax rate was 38% and 40% in 1996 and 1995,
    respectively, excluding the effect of the 1996 write-off of acquired
    technology associated with the acquisitions of U.K.-based Affinity
    Sensors and LabSystems, for which no tax benefit has been recorded. These
    rates exceed the statutory federal income tax rate primarily due to the
    impact of state income taxes. The effective tax rate decreased in 1996
    primarily due to income from certain newly acquired foreign companies,
    which are subject to lower tax rates.

                                        23PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    1995 Compared With 1994
        Revenues decreased 10% to $22.5 million in 1995 from $25.1 million in
    1994, primarily due to lower health physics sales which resulted from
    lower capital spending by commercial nuclear power producers and
    government laboratories, U.S. government budget constraints, and
    regulatory uncertainty concerning clean-up projects.
        The gross profit margin declined to 42% in 1995 from 44% in 1994.
    This reduction was primarily due to lower sales of high-margin personnel
    contamination monitors and environmental monitors produced by the
    Company's Eberline health physics subsidiary.
        Selling, general, and administrative expenses as a percentage of
    revenues increased to 21% in 1995 from 20% in 1994 due to the decrease in
    revenues noted above. Research and development expenses decreased to $1.3
    million in 1995 from $2.0 million in 1994 primarily due to the
    elimination of German research and development activities at the
    Company's MALDI-TOF subsidiary and a reduction in spending at the
    Company's Eberline health physics subsidiary in 1994 and in 1995.
        Interest income in 1995 represents interest on invested proceeds from
    the Company's private placements of common stock in March and April 1995.
        The effective tax rate was 40% in 1995 and 38% in 1994. These rates
    exceed the statutory federal rate primarily due to the impact of state
    income taxes. The increase in the effective rate resulted from the
    inability in 1995 to provide a tax benefit on foreign losses and a
    reduced tax benefit associated with the Company's foreign sales
    corporation.

    Liquidity and Capital Resources

        Consolidated working capital was $59.8 million as of December 28,
    1996, compared with $27.1 million as of December 30, 1995. Included in
    working capital are cash and cash equivalents of $45.5 million as of
    December 28, 1996, compared with $17.7 million as of December 30, 1995.
    During 1996, $8.6 million of cash was provided by operating activities.
    An increase in accounts payable and other current liabilities provided
    $3.1 million primarily as a result of higher accounts payable and accrued
    expense balances at DYNEX, which had been reduced from normal levels in
    anticipation of its acquisition by the Company. Cash flow from operations
    was reduced by an increase in accounts receivable of $2.1 million,
    primarily at DYNEX.
        Investing activities used $52.2 million of cash during 1996. The
    Company expended $50.7 million, net of cash acquired, for acquisitions
    (Note 2) and $1.5 million for purchases of property, plant, and
    equipment. The Company expects to make capital expenditures of
    approximately $2 million for purchases of property, plant, and equipment
    during 1997.
        During 1996, financing activities provided $70.8 million in cash. To
    help finance the acquisition of DYNEX, the Company borrowed $30.0 million
    from Thermo Electron pursuant to a promissory note due February 1997. In
    connection with the acquisition of Affinity Sensors and LabSystems in
    July 1996, the Company issued to Thermo Instrument a $50.0 million
    principal amount subordinated convertible note, and used part of the

                                        24PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Liquidity and Capital Resources (continued)

    proceeds to retire the $30.0 million promissory note issued to Thermo
    Electron. In September and October 1996, the Company sold 1,670,000
    shares of its common stock in an initial public offering for net proceeds
    of $20.8 million.
        Although the Company expects to have positive cash flow from its
    existing operations, the Company anticipates it will require significant
    amounts of cash for the possible acquisition of complementary businesses
    and technologies. The Company expects that it will finance these
    acquisitions through a combination of internal funds, additional debt or
    equity financing, and/or short-term borrowings from Thermo Instrument or
    Thermo Electron, although there is no agreement with these companies to
    ensure that funds will be available on acceptable terms or at all. The
    Company believes that its existing resources are sufficient to meet the
    capital requirements of its existing businesses for the foreseeable
    future.



                                        25PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                           Forward-looking Statements

        In connection with the "safe harbor" provisions of the Private
    Securities Litigation Reform Act of 1995, the Company wishes to caution
    readers that the following important factors, among others, in some cases
    have affected, and in the future could affect, the Company's actual
    results and could cause its actual results in 1997 and beyond to differ
    materially from those expressed in any forward-looking statements made
    by, or on behalf of, the Company.
        Intense Competition. The Company encounters and expects to continue
    to encounter intense competition in the sale of its products. The Company
    believes that the principal competitive factors affecting the markets for
    its products include product features, product performance, price, and
    service. The Company's competitors include a number of large
    multinational corporations. These companies and certain of the Company's
    other competitors have substantially greater financial, marketing, and
    other resources than the Company. As a result, they may be able to adapt
    more quickly to new or emerging technologies and changes in customer
    requirements, or to devote greater resources to the promotion and sale of
    their products than the Company. Competition could increase if new
    companies enter the market or if existing competitors expand their
    product lines or intensify efforts within existing product lines. There
    can be no assurance that the Company's current products, products under
    development or ability to develop new technologies will be sufficient to
    enable it to compete effectively.
        Rapid and Significant Technological Change and New Products. The
    markets for the Company's products are characterized by rapid and
    significant technological change, evolving industry standards, and
    frequent new product introductions and enhancements. Many of the
    Company's products and products under development are technologically
    innovative, and require significant planning, design, development, and
    testing, at the technological, product, and manufacturing process levels.
    These activities require significant capital commitments and investment
    by the Company. In addition, products that are competitive in the
    Company's markets are characterized by rapid and significant
    technological change due to industry standards that may change on short
    notice and by the introduction of new products and technologies that
    render existing products and technologies uncompetitive or obsolete.
    There can be no assurance that any of the products currently being
    developed by the Company, or those to be developed in the future, will be
    technologically feasible or accepted by the marketplace, that any such
    development will be completed in any particular time frame, or that the
    Company's products or proprietary technologies will not become
    uncompetitive or obsolete.
        Uncertainty of Market Acceptance of New Products. Certain of the
    Company's products represent alternatives to traditional instruments and
    methods and as a result may be slow to achieve, or may not achieve,
    market acceptance, as customers may seek further validation of the
    efficiency and efficacy of the Company's technology. This is particularly
    true where the purchase of the product requires a significant capital
    commitment. The Company's optical biosensor, MALDI-TOF, and capillary
    electrophoresis products are based on relatively new technologies. The
    Company believes that, to a significant extent, its growth prospects
    depend on its ability to gain acceptance by a broader group of customers
    of the efficiency and efficacy of the Company's innovative technologies.

                                        26PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                           Forward-looking Statements

    There can be no assurance that the Company will be successful in
    obtaining such broad acceptance.
        Dependence on Capital Spending Policies and Government Funding. The
    Company's customers include pharmaceutical, biotechnology, and chemical
    companies, and clinical diagnostic laboratories and companies. The
    capital spending policies of these companies can have a significant
    effect on the demand for the Company's products. Such policies are based
    on a wide variety of factors, including the resources available to make
    such purchases, the spending priorities among various types of research
    equipment, and the policies regarding capital expenditures during
    recessionary periods. Any decrease in capital spending by life sciences
    companies could have a material adverse effect on the Company's business
    and results of operations. Recently, biotechnology companies have raised
    significant amounts of capital through public share offerings, and most
    of these companies are engaged in active research and development
    programs that include capital spending. However, the availability of
    capital through the public markets can be cyclical and there can be no
    assurance that the raising of capital by these companies will continue,
    nor can there be any assurance that additional capital, if available,
    will result in increased sales of the Company's products.
        A significant portion of the Company's sales are to universities,
    government research laboratories, private foundations, and other
    institutions where funding is dependent on grants from government
    agencies such as the National Institutes of Health (NIH) and the
    equivalent of the NIH in foreign countries where the Company markets its
    products. If government funding necessary to purchase the Company's
    products were to become unavailable to researchers for any extended
    period of time, or if overall research funding were to decrease, the
    Company's business and results of operations could be adversely affected.
    In addition, a significant portion of sales by the Company's Eberline
    health physics subsidiary were made to various branches of the United
    States government, primarily the United States Department of Energy.
    Revenues attributable to sales to the Departments of Defense and Energy
    declined in 1996 compared to 1995. Any further decline in purchases by
    the United States government, including, without limitation, declines as
    the result of budgeting limitations, could have an adverse effect on the
    Company's business and results of operations.
        Dependence on Patents and Proprietary Rights. The Company places
    considerable importance on obtaining patent and trade secret protection
    for significant new technologies, products, and processes because of the
    length of time and expense associated with bringing new products through
    the development process and to the marketplace. The Company's success
    depends, in part, on its ability to develop patentable products and
    obtain and enforce patent protection for its products both in the United
    States and in other countries. The Company has filed and intends to file
    applications as appropriate for patents covering its products. No
    assurance can be given that patents will issue from any pending or future
    patent applications owned by or licensed to the Company, or that the
    claims allowed under any issued patents will be sufficiently broad to
    protect the Company's technology. In addition, no assurance can be given
    that any issued patents owned by or licensed to the Company will not be
    challenged, invalidated, or circumvented, or that the rights granted
    thereunder will provide competitive advantages to the Company. The

                                        27PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                           Forward-looking Statements

    Company could incur substantial costs in defending itself in suits
    brought against it or in suits in which the Company may assert its patent
    rights against others. If the outcome of any such litigation is
    unfavorable to the Company, the Company's business and results of
    operations could be materially adversely affected.
        The commercial success of the Company will also depend in part on its
    neither infringing patents issued to competitors or others, nor breaching
    the technology licenses upon which components of the Company's products
    are based. The Company is aware of patents and patent applications
    belonging to competitors and other third parties, and it is uncertain
    whether these patents and patent applications will require the Company to
    alter its products or processes, pay licensing fees, or cease making and
    selling infringing products and pay damages for past infringement. In
    particular, the Company is aware of a U.S. patent held by a third party
    that may relate to the design of the cuvette used in the Company's
    optical biosensor system. The Company is also aware of patents held by
    another third party that may relate to the features of certain of the
    Company's MALDI-TOF mass spectrometers. Although the Company believes
    that the validity and/or infringement of these patents may be subject to
    challenge, if the patent holder were successful in enforcing any such
    patent, the Company would be subject to damages for past infringement and
    enjoined from manufacturing and selling products utilizing the features
    associated with the patent, which could have a material adverse effect on
    the Company's business and results of operations.
        The Company relies on trade secrets and proprietary know-how which it
    seeks to protect, in part, by confidentiality agreements with its
    collaborators, employees, and consultants. There can be no assurance that
    these agreements will not be breached, that the Company would have
    adequate remedies for any breach, or that the Company's trade secrets
    will not otherwise become known or be independently developed by
    competitors. 
        Government Regulations; No Assurance of Regulatory Approval. The
    production and marketing of certain of the Company's products and its
    ongoing research and development activities are subject to regulation by
    government authorities in the United States and in other countries. To
    the extent that an analytical instrument will be used in human clinical
    or diagnostic applications, the manufacturer of that instrument must
    submit to the U.S. Food and Drug Administration (FDA), prior to
    commercial distribution of the instrument in the U.S., either a premarket
    notification (510(k)) or a premarket approval (PMA) application. The
    Company has, to date, been required to obtain 510(k) clearance with
    respect to certain clinical applications of its Microtiter(R) technology
    products. There can be no assurance that 510(k) clearance for any future
    product or modification of an existing product will be granted by the FDA
    within a reasonable time frame, if at all, that in the future the FDA
    will not require manufacturers of certain medical devices to engage in a
    more thorough and time consuming approval process than the 510(k)
    process, or that the FDA or certain corresponding state or international
    government agencies will permit marketing of the Company's products in
    their respective jurisdictions.
        As a result of the clinical applications of certain of the Company's
    Microtiter technology products, the Company is registered with the FDA as
    a medical device manufacturer. As such, the Company may be inspected on a

                                        28PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                           Forward-looking Statements

    routine basis by the FDA for compliance with the FDA's Good Manufacturing
    Practices and other applicable regulations. These regulations require
    that the Company manufacture its products and maintain related
    documentation in a prescribed manner with respect to manufacturing,
    testing, and quality control activities. Further, the Company is required
    to comply with various FDA requirements for reporting of product
    malfunctions and other matters.
        The regulatory standards for manufacturing are currently being
    applied stringently by the FDA and state regulatory agencies.
    Noncompliance with FDA or applicable state agency regulations, or
    discovery of previously unknown problems with a product, manufacturer, or
    facility may result in restrictions on such product or manufacturer,
    including fines, recalls, injunctions or seizures of products, refusal of
    the government to approve or clear product approval applications or to
    allow the Company to enter into government supply contracts, or even
    withdrawal of the product from the market, or criminal prosecution, any
    of which could have a material adverse effect on the Company's business
    and results of operations.
        International regulatory bodies often establish varying regulations
    governing product standards, packaging requirements, labeling
    requirements, import restrictions, tariff regulations, duties, and tax
    requirements. In order to continue to sell its products in Europe, the
    Company is required to maintain an ISO 9000 series registration, an
    internationally-recognized set of quality standards, and each of its
    products is required to obtain a CE mark, evidence of compliance with
    European Union electronic safety requirements. While the Company has an
    active program to comply with CE mark requirements and an ISO 9000
    compliance program, there can be no assurance that the Company will be
    successful in maintaining its compliance with applicable certification
    requirements. Any violation of, and the cost of compliance with, these
    regulations or requirements could have a material adverse effect on the
    Company's business and results of operations.
        Uncertainty of Patient Reimbursement. The Federal government
    regulates reimbursement of fees for certain diagnostic examinations and
    capital equipment acquisition costs connected with services to Medicare
    beneficiaries. Recent legislation has limited Medicare reimbursement for
    diagnostic examinations. For example, deficit reduction measures have
    resulted in reimbursement rate reductions in the past and may result in
    further rate reductions in the future. According to third party data,
    overall Medicare reimbursements were estimated to decline approximately
    2.3% in 1996 from 1995. These policies may have the effect of limiting
    the availability or reimbursement for procedures, and as a result may
    inhibit or reduce demand by healthcare providers for products in the
    markets in which the Company competes. While the Company cannot predict
    what effect the policies of government entities and other third party
    payors will have on future sales of the Company's products, there can be
    no assurance that such policies would not have an adverse impact on the
    operations of the Company.
        Potential Product Liability. The Company's business exposes it to
    potential product liability claims which are inherent in the
    manufacturing, marketing, and sale of biomedical instruments and
    diagnostic products, and as such the Company may face substantial
    liability to patients for damages resulting from the faulty design or

                                        29PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements

                           Forward-looking Statements

    manufacture of its products. The Company currently maintains product
    liability insurance, but there can be no assurance that this insurance
    will provide sufficient coverage in the event of a claim, that the
    Company will be able to maintain such coverage on acceptable terms, if at
    all, or that a product liability claim would not materially adversely
    affect the business or financial condition of the Company.
        Risks Associated with Acquisition Strategy. The Company's strategy
    includes the acquisition of businesses and technologies that complement
    or augment the Company's existing product lines. For example, in February
    1996, the Company acquired the DYNEX Technologies division of Dynatech
    Corporation, and, in July 1996, acquired the Affinity Sensors and
    LabSystems divisions of Fisons plc from Thermo Instrument. Promising
    acquisitions are difficult to identify and complete for a number of
    reasons, including competition among prospective buyers and the need for
    regulatory approvals, including antitrust approvals. Any acquisitions
    completed by the Company may be made at substantial premiums over the
    fair value of the net assets of the acquired companies. There can be no
    assurance that the Company will be able to complete future acquisitions
    or that the Company will be able to successfully integrate any acquired
    businesses. In order to finance such acquisitions, it may be necessary
    for the Company to raise additional funds through public or private
    financings. Any equity or debt financing, if available at all, may be on
    terms which are not favorable to the Company and, in the case of equity
    financing, may result in dilution to the Company's shareholders.
        Risks Associated With International Operations. International sales
    accounted for 48% of the Company's total revenues in 1996. The Company
    intends to continue to expand its presence in international markets.
    International revenues are subject to a number of risks, including the
    following: agreements may be difficult to enforce and receivables
    difficult to collect through a foreign country's legal system; foreign
    customers may have longer payment cycles; foreign countries may impose
    additional withholding taxes or otherwise tax the Company's foreign
    income, impose tariffs, or adopt other restrictions on foreign trade;
    fluctuations in exchange rates may affect product demand and adversely
    affect the profitability in U.S. dollars of products and services
    provided by the Company in foreign markets where payment for the
    Company's products and services is made in the local currency; U.S.
    export licenses may be difficult to obtain; and the protection of
    intellectual property in foreign countries may be more difficult to
    enforce. There can be no assurance that any of these factors will not
    have a material adverse impact on the Company's business and results of
    operations.
                                        30PAGE
<PAGE>
   Thermo BioAnalysis Corporation                    1996 Financial Statements

                         Selected Financial Information

   (In thousands except
   per share amounts)            1996(a)   1995(b)   1994      1993      1992
   --------------------------------------------------------------------------
   Statement of Operations
     Data:
   Revenues                  $ 71,649  $ 22,534  $ 25,127  $ 24,479  $ 20,120
   Income before provision
     for income taxes           1,464     4,188     3,855     4,313     2,624
   Net income (loss)             (436)    2,514     2,400     2,538     1,175
   Earnings (loss) per share     (.05)      .32       .36       .38       .18

   Balance Sheet Data:
   Working capital           $ 59,750  $ 27,105  $  8,282  $  6,333  $  5,808
   Total assets               122,997    32,907    14,349    13,596    11,767
   Subordinated convertible
     note, due to parent
     company                   50,000         -         -         -         -
   Shareholders' investment    51,316    29,146    10,162     8,332     7,838

   (a)Reflects the net proceeds of the Company's initial public offering of
      common stock in September and October 1996, and the results of DYNEX
      since February 1996 and of Affinity Sensors and LabSystems since their
      acquisition by Thermo Instrument in March 1996, including the
      associated write-off of $3,500,000 of acquired technology.
   (b)Reflects the net proceeds of the Company's private placements of common
      stock in March 1995 and April 1995.











                                       31PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements


    Common Stock Market Information
        The following table shows the market range for the Company's common
    stock based on reported sales prices on the American Stock Exchange
    (symbol TBA) since September 18, 1996, the date the Company's common
    stock began trading on that exchange.

                                                                   1996
                                                             ---------------
    Quarter                                                   High       Low
    ------------------------------------------------------------------------
    Third                                                  $14       $13 1/8
    Fourth                                                  14 5/8    12 1/2

        As of January 24, 1997, the Company had 138 holders of record of its
    common stock. This does not include holdings in street or nominee names.
    The closing market price on the American Stock Exchange for the
    Company's common stock on January 24, 1997, was $12 3/4 per share.

    Shareholder Services
        Shareholders of Thermo BioAnalysis Corporation who desire information
    about the Company are invited to contact John N. Hatsopoulos, Chief
    Financial Officer, Thermo BioAnalysis Corporation, 81 Wyman Street, P.O.
    Box 9046, Waltham, Massachusetts 02254-9046, (617) 622-1111. A mailing
    list is maintained to enable shareholders whose stock is held in street
    name, and other interested individuals, to receive quarterly reports,
    annual reports, and press releases as quickly as possible. Beginning in
    1997, quarterly distribution will be limited to the second quarter report
    only. All quarterly reports and press releases are available through the
    Internet from Thermo Electron's home page on the World Wide Web
    (http://www.thermo.com/subsid/tba.html).

    Stock Transfer Agent
        American Stock Transfer & Trust Company is the stock transfer agent
    and maintains shareholder activity records. The agent will respond to
    questions on issuance of stock certificates, change of ownership, lost
    stock certificates, and change of address. For these and similar
    matters, please direct inquiries to:

        American Stock Transfer & Trust Company
        Shareholder Services Department
        40 Wall Street, 46th Floor
        New York, New York 10005
        (718) 921-8200

    Dividend Policy
        The Company has never paid cash dividends and does not expect to pay
    cash dividends in the foreseeable future because its policy has been to
    use earnings to finance expansion and growth. Payment of dividends will
    rest within the discretion of the Board of Directors and will depend
    upon, among other factors, the Company's earnings, capital requirements,
    and financial condition.


                                        32PAGE
<PAGE>
    Thermo BioAnalysis Corporation                  1996 Financial Statements


    Form 10-K Report
        A copy of the Annual Report on Form 10-K for the fiscal year ended
    December 28, 1996, as filed with the Securities and Exchange Commission,
    may be obtained at no charge by writing to John N. Hatsopoulos, Chief
    Financial Officer, Thermo BioAnalysis Corporation, 81 Wyman Street, P.O.
    Box 9046, Waltham, Massachusetts 02254-9046.

    Annual Meeting
        The annual meeting of shareholders will be held on Monday, June 2,
    1997, at 10:00 a.m., at the Hyatt Regency Hotel, Hilton Head, South
    Carolina.



                                        33


                                                                    Exhibit 21


                         THERMO BIOANALYSIS CORPORATION

                         Subsidiaries of the Registrant


   At February 28, 1997, the Registrant owned the following companies:


                                                                  Registrant's
                                           State of Jurisdiction      % of
   Name                                       or Incorporation      Ownership
   ---------------------------------------------------------------------------

   DYNEX Technologies (Asia) Inc.                  Delaware            100

   DYNEX Technologies Inc.                         Virginia            100

   Thermo BioAnalysis GmbH                          Germany            100

        Dynatech Deutschland GmbH                   Germany            100

        Thermo LabSystems Vertriebs GmbH           Germany             100

   Dynatech Labratories spol. s.r.o.            Czech Republic         100

   Thermo BioAnalysis (Guernsey) Ltd.           Channel Islands        100

   Thermo BioAnalysis Holding, Limited              England            100

        Thermo LabSystems Limited                   England            100

        Thermo BioAnalysis Limited                  England            100

        Thermo Fast U.K. Limited                    England            100

        Dynex Technologies Limited                  England            100

   Thermo BioAnalysis S.A.                          France             100

        Thermo LabSystems S.A.R.L.                  France             100

   Thermo LabSystems Inc.                        Massachusetts         100

   Thermo LabSystems (Australia) Pty Limited       Australia           100


<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THERMO
BIOANALYSIS CORPORATION'S ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER
28, 1996 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-28-1996
<PERIOD-END>                               DEC-28-1996
<CASH>                                          45,476
<SECURITIES>                                         0
<RECEIVABLES>                                   18,256
<ALLOWANCES>                                       991
<INVENTORY>                                     14,592
<CURRENT-ASSETS>                                81,235
<PP&E>                                          12,129
<DEPRECIATION>                                   6,582
<TOTAL-ASSETS>                                 122,997
<CURRENT-LIABILITIES>                           21,485
<BONDS>                                              0
                                0
                                          0
<COMMON>                                            98
<OTHER-SE>                                      51,218
<TOTAL-LIABILITY-AND-EQUITY>                   122,997
<SALES>                                         71,649
<TOTAL-REVENUES>                                71,649
<CGS>                                           37,807
<TOTAL-COSTS>                                   37,807
<OTHER-EXPENSES>                                10,798
<LOSS-PROVISION>                                   210
<INTEREST-EXPENSE>                               1,873
<INCOME-PRETAX>                                  1,464
<INCOME-TAX>                                     1,900
<INCOME-CONTINUING>                              (436)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     (436)
<EPS-PRIMARY>                                    (.05)
<EPS-DILUTED>                                        0
        

</TABLE>


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