EXHIBIT 5.1

                             RICHARDSON & PATEL, LLP
                              10900 Wilshire Blvd.
                                    Suite 500
                          Los Angeles, California 90024
                               Tel (310) 208-1182
                               Fax (310) 208-1154


                                  June 29, 2006

Universal Detection Technology
9595 Wilshire Blvd., Suite 700
Beverly Hills, California 90212

         Re:      2006 Consultant Stock Plan

Ladies and Gentlemen:

         We have acted as counsel to Universal Detection Technology, a
California corporation (the "Company"), in connection with the preparation of
the filing with the Securities and Exchange Commission under the Securities Act
of 1933 of the Company's Registration Statement on Form S-8 relating to
25,000,000 shares of the Company's common stock (the "Shares").

           In connection with that registration, we have reviewed the
proceedings of the Board of Directors of the Company relating to the
registration and proposed issuance of the Shares, the Certificate of
Incorporation of the Company and all amendments thereto, the Bylaws of the
Company and all amendments thereto, and such other documents and matters as we
have deemed necessary to the rendering of the following opinion.

         Based upon that review, it is our opinion that the Shares, when issued
will be legally issued, fully paid, and nonassessable. We do not find it
necessary for the purposes of this opinion to cover, and accordingly we express
no opinion as to the application of the securities or blue sky laws of the
various states of the United States to the issuance and sale of the Shares.

         We consent to the use of this opinion in the registration statement
filed with the Securities and Exchange Commission in connection with the
registration of the Shares and to the reference to our firm under the heading
"Interests of Named Experts and Counsel" in the registration statement.

                                            /s/ RICHARDSON & PATEL, LLP