NEWBURY PARK, Calif.–(BUSINESS WIRE)—March 14, 2007 –Electronic Sensor Technology (EST), a leading provider of innovative Homeland Security and Environmental solutions, announced today that it has received an initial order of 2 zNose® units from China Ministry of Public Security through its distributor, Beijing R&D Ltd. The scientists in the Ministry of Public Security plan to utilize these units for added capability to detect drugs and explosives beside the standard Ion Mobility Spectrometer (IMS) equipment. “I am happy to announce that EST has finally broken into the Chinese security market for our zNose®. We expect to receive more orders in the coming months once the officers are familiarized with zNose®,” said Dr. Teong C. Lim, President of EST.

Also, the Tea Science Society of China has ordered a unit of zNose® to determine the contamination of tea for public health safety. Tea consumption is one of the largest commercial industries in the Peoples Republic of China and the Chinese authority is trying to set a standard for public health safety.  The scientists from the Tea Science Society, through an arrangement by EST, have been trained by Prof. Dr. W. Boland, a world-renowned authority for chemical ecology, at Max Plank Institute in Germany for this application. A copy of his technical paper utilizing zNose® for such application is given as follow:

https://www.estcal.com/TechPapers/Tea.pdf

About Electronic Sensor Technology:

Founded in 1995, Electronic Sensor Technology has developed and patented a chemical vapor analysis process. We believe that the Company’s product line is positioned to eliminate key vulnerabilities in the homeland security market, specifically in military applications, maritime port and border security applications.

SEC Filings and Forward-Looking Statements

This press release includes forward-looking statements, including the Company’s expectations regarding its ability to develop and access capital markets and its ability to achieve expected results in the chemical detection and analysis industry. The forward-looking statements are identified through the use of the words “potential,” “anticipate,” “expect,” “planned” and other words of similar meaning. These forward-looking statements may be affected by the risks and uncertainties inherent in the chemical detection and analysis industry and in the Company’s business. The Company cautions readers that certain important factors may have affected and could in the future affect the Company’s beliefs and expectations, and could cause the actual results to differ materially from those expressed in any forward-looking statement made by or on behalf of the Company. For a discussion of these factors, please refer to our recent filings with the Securities and Exchange Commission, including our most recent report on Form 10-KSB. The Company undertakes no obligation to update forward-looking statements to reflect events or circumstances after the date hereof.

Contact:

Electronic Sensor Technology

Frank Zuhde, 805-480-1994, X135