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 annual report on Form 10-KSB/A of Universal Detection
     Technology;


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

3.   Based on my knowledge, the financial statements, and other financial
     information included in this annual report, fairly present in all material
     respects the financial condition, results of operations and cash flows of
     the small business issuer as of, and for, the periods presented in this
     annual report;

4.   The small business issuer's other certifying officer(s) 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)) for
     the small business issuer 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 that material information relating to the small
          business issuer, including its consolidated subsidiaries, is made
          known to us by others within those entities, particularly during the
          period in which this annual report is being prepared;

     b)   Evaluated the effectiveness of the small business issuer's disclosure
          controls and procedures and presented in this annual report our
          conclusions about the effectiveness of the disclosure controls and
          procedures, as of the end of the period covered by this annual report
          based on such evaluation; and

     c)   Disclosed in this annual report any change in the small business
          issuer's internal control over financial reporting that occurred
          during the small business issuer's most recent fiscal quarter (the
          small business issuer's fourth quarter in the case of an annual
          report) that has materially affected, or is likely to materially
          affect, the small business issuer's internal control over financial
          reporting; and

5.   The small business issuer's other certifying officer(s) and I have
     disclosed, based on our most recent evaluation of internal control over
     financial reporting, to the small business issuer's auditors and the audit
     committee of small business issuer's board of directors (or persons
     performing the equivalent function):

     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 small business issuer's
          ability to record, process, summarize and report financial data and
          have identified for the small business issuer'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 small business issuer's
          internal control over financial reporting.


Date:  September 17, 2004




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



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