Electronic Sensor Technology Inc (ESNR)

[Z-NOSE]

(EST Announces Agreement with the Convertible Debenture Holders)


NEWBURY PARK, Calif., Dec 28, 2007 (BUSINESS WIRE) -- Electronic Sensor
Technology (OTCBB:ESNR), a leading manufacturer of ultra-fast vapor analyzers,
announced that they have signed an agreement with the convertible debenture
holders which postpones the first principal payment until April 1, 2008.

Barry S. Howe, President and CEO, stated: "This change in the repayment schedule
of the convertible debentures will provide the company with needed relief as we
continue to pursue opportunities to raise additional capital."

About Electronic Sensor Technology:

Electronic Sensor Technology develops, manufactures, sells, and supports a
product line of patented chemical vapor analyzers. The ultra high speed gas
chromatography coupled with a solid state detector enables analysis of nearly
any odor, fragrance, or chemical vapor within ten seconds. We believe that the
Company's product line is strategically positioned to address key needs of the
homeland security market, environmental and quality assurance applications, and
product quality of food and beverage.