EXHIBIT 23.1





            Consent of Independent Registered Public Accounting Firm


The Board of Directors
Vicon Industries, Inc.:


We consent to the  incorporation by reference in the Registration  Statements on
Form S-8 (Nos. 33-7892, 33-34349, 33-90038, 333-30097, 333-71410 and 333-116361)
and Form S-2 (No.  333-46841)  of Vicon  Industries,  Inc.  of our report  dated
December  8,  2005,  relating  to  the  consolidated   balance  sheet  of  Vicon
Industries,  Inc. and  subsidiaries  as of September  30, 2005,  and the related
consolidated  statements of operations,  shareholders' equity and cash flows and
related  schedule  for the two years ended  September  30,  2005,  which  report
appears  in the  September  30,  2005  annual  report  on  Form  10-K  of  Vicon
Industries, Inc.


                                                            /s/ BDO Seidman, LLP


Melville, New York
December 29, 2005