EXHIBIT 23.1

AJ. ROBBINS, P.C.

CERTIFIED PUBLIC ACCOUNTANTS

216 SIXTEENTH STREET

SUITE 600

DENVER, COLORADO 80202

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTANTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of Universal Detection Technology of our report dated March 9, 2007 except for Note 12, which is dated March 28, 2007 relating to the consolidated financial statements of Universal Detection Technology.

/s/ AJ. ROBBINS

AJ. ROBBINS, P.C.

CERTIFIED PUBLIC ACCOUNTANTS 

Denver, Colorado

July 13, 2007