Exhibit 23.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No. 333-34929 and 333-34867 of Sentry Technology Corporation on Form S-8 of our report dated February 27, 2009 appearing in this Annual Report on Form 10-K of Sentry Technology Corporation for the year ended December 31, 2008. /s/ SF Partnership, LLP Chartered Accountants Toronto, Canada March 16, 2009