[UNIVERSAL DETECTION TECHNOLOGY LETTERHEAD]



August 23, 2004


Mr. Jacques Tizabi
c/o Universal Detection Technology, Inc.
9595 Wilshire Blvd., Suite 700
Beverly Hills, CA 90069

     RE: AMENDMENT TO EMPLOYMENT AGREEMENT

Dear Mr. Tizabi:

Reference is made to the certain Employment Agreement between Pollution Research
and Control Corporation, now known as UNIVERSAL DETECTION TECHNOLOGY, INC.,
("UDT") on one hand, and JACQUES TIZABI ("Tizabi") on the other, dated as of
September 25, 2001 (the "Agreement").

In consideration of the mutual covenants and promises contained herein, as well
as, other good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged, the parties agree to amend the Agreement as follows:

     1.   Paragraph 3 shall be amended such that the Term of the Agreement shall
          expire on December 31, 2010, unless otherwise extended.

     2.   Paragraph 4.1.2 shall be amended such that the One Hundred Thousand
          Dollars ($100,000.00) shall be accrued and deferred until such time as
          UDT has the financial resources to pay any or all of the accrued
          amount. Commencing on January 1, 2006, the Base Salary shall be
          cumulatively increased by five percent (5%) per year, on the first day
          of each year.

     3.   Paragraph 4.4.2 shall be amended to limit the Automobile Cost to a
          maximum of Two Thousand Five Hundred Dollars ($2,500.00) per month.

     4.   Paragraph 4.4.4 shall be amended to include a reimbursement of
          Officer's individual life insurance premium which shall not exceed One
          Thousand Dollars ($1,000.00) per month. Additionally, UDT shall
          reimburse Tizabi for his health insurance premiums and related
          expenses.

All other terms and conditions contained in the Agreement shall remain in full
force and effect, unless and until modified in writing and signed by the
parties.

If the aforementioned is accepted, understood and agreed to, please indicate
such by affixing your signature below and together with UDT's shall constitute
the entire agreement.

Sincerely,

UNIVERSAL DETECTION TECHNOLOGY, INC.


BY:  /s/ Matin Emouna
---------------------------------
Its:


Accepted, Understood & Agreed:


/s/ Jacques Tizabi
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Jacques Tizabi