EXHIBIT 31.2
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Rule 13a-14(a)/15d-14(a) CERTIFICATION


I, James M. O'Connell, certify that:

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


May 7, 2004

                                  /s/ James M. O'Connell
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                                  Chief Financial Officer