Exhibit 31.2


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


    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

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                   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 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 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 control over financial
                   reporting.



          Date:   May  7,  2004       /s/ Christine A. Tsingos
                  -------------       ------------------------
                                      Christine A. Tsingos
                                      Vice President,
                                      Chief Financial Officer

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