X0303 4 2009-12-01 0 0001122860 Electronic Sensor Technology, Inc ESNR 0001316640 Lim Teong 1077 BUSINESS CENTER CIRCLE NEWBURY PARK CA 91320 1 1 0 0 President and CEO Stock Option (right to buy) .02 2009-12-01 4 A 0 495600 0 A 2019-11-30 Common Stock 495600 495600 D The options granted to Dr. Lim will vest as follows: one quarter of the options shares will vest on December 1, 2010, one quarter on December 1, 2011, one quarter on December 1, 2012 and one quarter on December 1, 2013. Exhibit 24 - Power of Attorney (incorporated by reference from Form 3 filed on December 29, 2006) /s/ Philip Yee, as Attorney-in-Fact for Teong Lim 2009-12-03