SECTION 302 CERTIFICATION:

                                                                    EXHIBIT 31.2


CERTIFICATION PURSUANT TO RULE 13(A) OR 15(D) OF THE SECURITIES EXCHANGE ACT OF
   1934, AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 202

I, JOAN E. MILLER, CERTIFY THAT:

1.   I  have  reviewed  this  Quarterly Report on Form 10-Q of Sentry Technology
Corporation;

2.   Based  on  my  knowledge, this quarterly 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 quarterly
report;

3.   Based  on  my  knowledge,  the  financial  statements,  and other financial
information  included  in  this quarterly 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 quarterly 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, or caused such disclosure
     controls and procedures to be designed under our supervision, to ensure the
     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 quarterly 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
     principals;

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 materially affected, or is reasonably likely to
     materially affect, the Registrant's internal control over financial
     reporting.

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 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
          control over financial reporting.


     Dated:     November 14, 2008

     By:       /s/ Joan E. Miller
               ---------------------------------------------
     Name:     Joan E. Miller
               Vice President - Finance and Treasurer
     Title:    (Principal Financial and Accounting Officer)