EXHIBIT 99.1
JOINT FILING AGREEMENT
In accordance with Rule 13d-1(k) under the Securities Exchange Act of
1934, as amended, the undersigned hereby agree to the joint filing with all
other Reporting Persons (as such term is defined in the Schedule 13D) on behalf
of each of them of a statement on Schedule 13D (including amendments thereto)
with respect to the Common Stock, $0.001 par value per share of Electronic
Sensor Technology, Inc., and that this Agreement be included as an Exhibit to
such joint filing. This Agreement may be executed in any number of counterparts,
all of which taken together shall constitute one and the same instrument.
IN WITNESS WHEREOF, the undersigned hereby executed this Agreement
this 7th day of April, 2008.
By: /s/ Xxxxxx Xxx
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Name: Xxxxxx Xxx
Title: Attorney-in-Fact for Xxxxx Xxx
XX XXX, LLC
/s/ Xxxxxx Xxx
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Name: Xxxxxx Xxx
Title: Attorney-in-Fact
