SECTION 302 CERTIFICATION:
                                                                   EXHIBIT 31.1



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 2002

I, PETER L. MURDOCH, 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:     August 11, 2008


     BY:       /s/ Peter L. Murdoch
               -------------------------------
     NAME:     Peter L. Murdoch
     TITLE:    President and Chief Executive Officer