Exhibit 31.2



       CHIEF FINANCIAL OFFICER SECTION 302 CERTIFICATION



       I, Christine A. Tsingos, certify that:

       1.   I have reviewed this quarterly report on Form 10-Q 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 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

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            control over financial reporting, to the registrant's
            auditors and the audit committee of the registrant's board of
            directors:

                 a.        all significant deficiencies and material
                           weaknesses in the design or operation of
                           internal controls over financial reporting
                           which are reasonably 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 controls over financial reporting.




            Date:   August 6, 2003           /s/ Christine A. Tsingos
                                             Christine A. Tsingos
                                             Vice President,
                                             Chief Financial Officer



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