EXHIBIT 31.2                     CERTIFICATION

I, Jonathon M. Singer, certify that:

1.    I have reviewed this annual report on Form 10-K 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)) and internal
      control over financial reporting (as defined in Exchange Act Rules
      13a-15(f) and 15d-15(f)) 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.     Designed such internal control over financial reporting, or
             caused such internal control over financial reporting to be
             designed under our supervision, to provide reasonable assurance
             regarding the reliability of financial reporting and the
             preparation of financial statements for external purposes in
             accordance with generally accepted accounting principles;

      c.     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

      d.     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 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.

December 13, 2010              /s/ Jonathon M. Singer
                               Jonathon M. Singer
                               Chief Financial Officer