Electronic Sensor Technology Completes $7 Million Private Placement

NEWBURY PARK, CA (BUSINESS WIRE)- December 7, 2005 – Electronic Sensor Technology (OTCBB: ESNR), a leading provider of innovative Homeland Security solutions, announced today that it has raised gross proceeds of $7 million through the completion of a private placement of four-year, 8% unsecured convertible debentures and warrants to institutional investors. The proceeds will be used for working capital and other corporate purposes.

The debentures are convertible into common stock at a price of $0.45 per share, or equal to 105% of the volume weighted average price over the previous 20 trading days (VWAP). Electronic Sensor also issued warrants, allowing the investors to purchase $5,250,000 worth of common stock at a price equal to $0.48 per share, or 110% of the VWAP.

The shares underlying the debenture and warrants have not been registered. The Company has agreed to register the shares of common stock underlying the debentures and the warrants.

About Electronic Sensor Technology:

Founded in 1995, Electronic Sensor Technology has developed and patented a very unique chemical vapor analysis process. The Company has developed and manufactures an instrument called the zNose(R). This unique electronic sensor device can capture and analyze nearly any odor, fragrance or chemical vapor within ten seconds. The Company believes that its product line is positioned to provide a solution to key vulnerabilities in the homeland security and environmental applications.