As filed with the Securities and Exchange Commission on April 3, 2008 Registration No. 333-130900 ================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 ---------- POST-EFFECTIVE AMENDMENT NO. 2 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ELECTRONIC SENSOR TECHNOLOGY, INC. (Exact name of registrant as specified in its charter) Nevada 3679 98-0372780 (State or other (Primary Standard Industrial (I.R.S. Employer jurisdiction of Classification Code Number) Identification Number) incorporation or organization) 1077 Business Center Circle Newbury Park, California 91320 (805) 480-1994 (Address and Telephone Number of Principal Executive Offices and Principal Place of Business) Philip Yee Secretary, Treasurer and Chief Financial Officer 1077 Business Center Circle Newbury Park, California 91320 (805) 480-1994 (Name, Address and Telephone Number of Agent For Service) With a copy to: Neil W. Rust, Esq. White & Case LLP 633 West Fifth Street Los Angeles, California 90071 (213) 620-7700 Approximate Date of Proposed Sale to the Public: Not applicable. If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box. [ ] If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [ ] If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [ ] If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [ ] Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act. Large accelerated filer [ ] Accelerated filer [ ] Non-accelerated filer [ ] Smaller reporting company [X] (Do not check if a smaller reporting company) ================================================================================ THIS POST-EFFECTIVE AMENDMENT NO. 2 TO THE REGISTRATION STATEMENT ON FORM S-1 SHALL BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(c) OF THE SECURITIES ACT OF 1933, AS AMENDED, ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(c), MAY DETERMINE. DEREGISTRATION OF SECURITIES; TERMINATION OF REGISTRATION STATEMENT On November 21, 2006, the Securities and Exchange Commission declared effective this Registration Statement on Form S-1 (previously on Form SB-2) File No. 333-130900 of Electronic Sensor Technology, Inc. relating to the resale from time to time of up to 27,538,695 shares of common stock of the company by the selling security holders named in this Registration Statement. The company has determined that it will no longer maintain effectiveness of this Registration Statement in light of the recent cancellation of certain debentures and expiration and cancellation of certain warrants, the common stock of the Company underlying which was registered pursuant to this Registration Statement. Further, most, if not all, of the remaining common stock of the Company registered pursuant to the Registration Statement would now be eligible for resale pursuant to Rule 144 of the Securities Act of 1933, as amended, if the conditions of Rule 144 are met. Accordingly, this Post-Effective Amendment No. 2 is being filed to deregister all of the shares of common stock of the company that remain unsold under this Registration Statement, and to terminate the effectiveness of this Registration Statement. Signatures Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused Post-Effective Amendment No. 2 to Registration Statement on Form S-1 to be signed on its behalf by the undersigned, thereunto duly authorized in the City of Newbury Park, State of California, on April 3, 2008. ELECTRONIC SENSOR TECHNOLOGY, INC. By: /s/ Barry S. Howe --------------------------------------- Barry S. Howe President and Chief Executive Officer (Principal Executive Officer) In accordance with the requirements of the Securities Act of 1933, this Post-Effective Amendment No. 2 to Registration Statement on Form S-1 has been signed by the following persons in the capacities and on the dates stated. Date: April 3, 2008 By: /s/ Barry S. Howe --------------------------------------- Barry S. Howe President and Chief Executive Officer (Principal Executive Officer) Date: April 3, 2008 By: /s/ Philip Yee --------------------------------------- Philip Yee Secretary, Treasurer and Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer) Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment No. 2 to Registration Statement on Form S-1 has been signed below by the following persons in the capacities and on the dates indicated. Date: April 3, 2008 By: * ------------------------------ James H. Frey, Chairman Date: April 3, 2008 By: * ------------------------------ Francis H. Chang, Director Date: April 3, 2008 By: * ------------------------------ Teong C. Lim, Director Date: April 3, 2008 By: * ------------------------------ Barry S. Howe, Director Date: April 3, 2008 By: * ------------------------------ James Wilburn, Director Date: April 3, 2008 By: * ------------------------------ Rita Benoy Bushon, Director Date: April 3, 2008 By: * ------------------------------ Lewis Larson, Director *By: /s/ Philip Yee ----------------------------- Philip Yee Attorney-in-Fact Exhibit Index Exhibit Number Description ------- ------------------------------------------------------------------- 24.1 Power of Attorney.