EXHIBIT 31.1


                                CERTIFICATION OF
          CHIEF EXECUTIVE OFFICER AND ACTING CHIEF FINANCIAL OFFICER OF
                         UNIVERSAL DETECTION TECHNOLOGY

I, Jacques Tizabi, certify that:

     1.   I have reviewed this Quarterly Report on Form 10-QSB of Universal
          Detection Technology;

     2.   Based on my knowledge, this 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 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.   I am responsible for establishing and maintaining disclosure controls
          and procedures (as defined in Exchange Act Rules 13a-15(e) and
          15d-15(e)) for the registrant and I have:

          a)   Designed such disclosure controls and procedures, or caused such
               disclosure controls and procedures to be designed under our
               supervision, to ensure that material information relating to the
               registrant, including its consolidated subsidiaries, is made
               known to me by others within those entities, particularly during
               the period in which this report is being prepared;

          b)   Evaluated the effectiveness of the registrant's disclosure
               controls and procedures and presented in this report my
               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

          c)   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 (the registrant's fourth
               fiscal quarter in the case of an annual report) that has
               materially affected, or is reasonably likely to materially
               affect, the registrant's internal control over financial
               reporting; and




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     5.   I have disclosed, based on my most recent evaluation of internal
          control over financial reporting, to the registrant's auditors and the
          audit committee of the registrant's board of directors (or persons
          performing the equivalent functions):

          a)   All significant deficiencies and material weaknesses in the
               design or operation of internal control 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.

Date:  September 12, 2005



 /s/ Jacques Tizabi
---------------------------------------------------
By:      Jacques Tizabi
Title:   Chief Executive Officer and Acting
         Chief Financial Officer