SECTION  302  CERTIFICATION


                                                             Exhibit  31.2

CERTIFICATION  PURSUANT  TO
SECTION  302  OF
THE  SARBANES-OXLEY  ACT  OF  2002

Certification  of  Principal  Financial  Officer

I,  Joan  E.  Miller,  certify  that

1.   I have reviewed this annual report on Form 10-K of Sentry Technology
     Corporation;

2.   Based on my knowledge, this annual 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 annual 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 we have:

     a)    designed  such  disclosure  controls  and  procedures 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 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  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, to the registrant's auditors and the audit
     committee of registrant's board of directors (or persons performing the
     equivalent function):

     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.


                             /s/  JOAN  E.  MILLER
                          -------------------------------------------------
                            Joan  E.  Miller
                            Vice  President  and  Principal  Financial Officer

                            March 16,  2009