Electronic Sensor Technology, Inc. Receives follow-on order from GEI Consultants

Thursday, October 26, 9:30 am ET

NEWBURY PARK, Calif.--(BUSINESS WIRE)—October 26, 2006--Electronic Sensor Technology (EST) (OTC BB: ESNR.OB), a leading provider of innovative environmental and security solutions, announces the receipt of follow-on order from GEI Consultants for their third zNoseâ to be used for testing air samples while monitoring reclamation sites. The zNoseâ has demonstrated the ability to detect and quantify the chemicals in air samples to a very low level. If the concentration level of selected chemicals, such as known carcinogens, is above allowable limits, the zNoseâ alerts the GEI Consultant’s Engineer to the condition and the reclamation work stops until the problem is corrected. This capability provides workers with real time safeguards in their workplace.

"We are very pleased with this order from GEI Consultants for their third zNoseâ instrument. I am personally gratified to know that EST can play such an important part in helping to ensure a healthier and safer work place for these workers dedicated to improving our environment” said Dr. Teong Lim, President and CEO of EST.

More information on the use of the zNose® for monitoring air, water and soil pollution in real time can be obtained by clicking the following link: http://www.estcal.com/TechPapers/Environmental/EnvironmentalProtection2006.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 maritime port, airport 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 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, ext. 135
or
Aurelius Consulting Group, Inc.
Jon Cunningham, 407-644-4256, ext. 107