Exhibit 31.2


                Certification of Chief Financial Officer
                     Required By Exchange Act Rules
            13a-14(a) and (17 CFR 240.13a-14(a)and 15d-14(a)


    I, Christine A. Tsingos, certify that:

    1.   I have reviewed this annual report on Form 10-K of Bio-Rad
         Laboratories, Inc.

    2.   Based on my knowledge, this report does not contain any
         untrue statement of a material fact or omit to state a
         material fact necessary to make the statements made, in
         light of the circumstances under which such statements were
         made, not misleading with respect to the period covered by
         this report;

    3.   Based on my knowledge, the financial statements, and other
         financial information included in this report fairly
         present, in all material respects the financial condition,
         results of operations and cash flows of the registrant as
         of, and for, the periods presented in this report;

    4.   The registrant's other certifying officer and I are
         responsible for establishing and maintaining disclosure
         controls and procedures (as defined in Exchange Act Rules
         13a-15(e) and 15d-15(e)) for the registrant and have:

              (a)  Designed such disclosure controls and procedures,
                   or caused such disclosure controls and procedures
                   to be designed under our supervision, to ensure that
                   material information relating to the registrant,
                   including its consolidated subsidiaries, is made
                   known to us by others within those entities,
                   particularly during the period in which this report
                   is being prepared;

              (b)  Evaluated the effectiveness of the
                   registrant's disclosure controls and procedures
                   and presented in this report our conclusions about
                   the effectiveness of the disclosure controls and
                   procedures, as of the end of the period covered by
                   this report based on such evaluation; and

              (c)  Disclosed in this report any change in
                   the registrant's internal control over financial
                   reporting that occurred during the registrant's
                   most recent fiscal quarter (the registrant's
                   fourth fiscal quarter in the case of an annual
                   report) that has materially affected, or is
                   reasonably likely to materially affect, the
                   registrant's internal control over financial
                   reporting; and

    5.   The registrant's other certifying officer and I have
         disclosed, based on our most recent evaluation of internal
         control over financial reporting, to the registrant's
         auditors and the audit committee of the registrant's board
         of directors (or persons performing the equivalent
         functions):

              (a)  All significant deficiencies and
                   material weaknesses in the design or operation of
                   internal control over financial reporting which
                   are reasonable likely to adversely affect the
                   registrant's ability to record, process, summarize
                   and report financial information; and

              (b)  Any fraud, whether or not material, that
                   involves management or other employees who have a
                   significant role in the registrant's internal
                   control over financial reporting.



         Date:   March 12, 2004   /s/ Christine A. Tsingos
                                  Christine A. Tsingos
                                  Vice President,
                                  Chief Financial Officer
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