10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K/A

þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2008

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission file number: 001-31783

RAE Systems Inc.

(Exact name of registrant as specified in its charter)

Delaware	77-0280662
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
3775 North First Street San Jose, California	95134
(Address of principal executive offices)	(Zip Code)

408-952-8200
(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Name of Each Exchange on Which Registered
Common Stock, $0.001 par value per share	NYSE Alternext US

Securities registered pursuant to Section 12(g) of the Act:
None

     Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes o   No þ

     Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act. Yes o   No þ

     Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes þ   No o

     Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. þ

     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. (Check one):

Large accelerated filer o Accelerated filer þ Non-accelerated filer o (Do not check if a smaller reporting company) Smaller reporting company o

     Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o    No þ

     As of June 30, 2008, the aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant was approximately $84,983,775, based upon the closing sale price of $1.43 on the NYSE Alternext US (formerly the American Stock Exchange) on June 30, 2008, the last business day of the registrant’s most recently completed second fiscal quarter. As of the close of business on February 28, 2009, the number of shares of registrant’s Common Stock outstanding was 59,443,914.

DOCUMENTS INCORPORATED BY REFERENCE

     Portions of the registrant’s proxy statement for its 2009 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K.

SIGNATURES

     Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on December 21, 2009.

RAE SYSTEMS INC.
By:	/s/ Robert I. Chen
	Robert I. Chen
	President and Chief Executive Officer

     KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Robert I. Chen and Randall Gausman, and each of them, as such person’s true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for such person and in such person’s name, place and stead, in any and all capacities, to sign any and all amendments to this report on Form 10-K, and to file same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as such person might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

     Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed by the following persons in the capacities and on the dates indicated:

Signature	Title	Date
/s/ Robert I. Chen Robert I. Chen	President, Chief Executive Officer and Chairman of the Board (Principal Executive Officer)	December 21, 2009
/s/ Randall Gausman Randall Gausman	Vice President and Chief Financial Officer (Principal Financial and Accounting Officer)	December 21, 2009
/s/ Peter C. Hsi Peter C. Hsi	Chief Technology Officer, Vice President of Emerging Technologies Development and Director	December 21, 2009
/s/ Lyle D. Feisel by Randall Gausman, attorney-in-fact Lyle D. Feisel by Randall Gausman, attorney-in-fact	Director	December 21, 2009
/s/ Sigrun Hjelmqvist by Randall Gausman, attorney-in-fact Sigrun Hjelmqvist by Randall Gausman, attorney-in-fact	Director	December 21, 2009
	Director
Keh-Shew Lu
/s/ James W. Power by Randall Gausman, attorney-in-fact James W. Power by Randall Gausman, attorney-in-fact	Director	December 21, 2009
	Director
Susan Wang

-2- 

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the Annual Report of RAE Systems Inc. (the “Company”) on Form 10-K for the year ended December 31, 2008, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Robert I. Chen, President, Chief Executive Officer and Chairman of the Board of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (“Section 906”), that:

(1)	The Report fully complies with the requirements of section 13(a) of the Securities Exchange Act of 1934 (15 U.S.C. 78m); and
(2)	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: March 13, 2009	/s/ Robert I. Chen
	Robert I. Chen
	President, Chief Executive Officer and Chairman of the Board

     A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the Annual Report of RAE Systems Inc. (the “Company”) on Form 10-K for the year ended December 31, 2008, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Randall Gausman, Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (“Section 906”), that:

(1)	The Report fully complies with the requirements of section 13(a) of the Securities Exchange Act of 1934 (15 U.S.C. 78m); and
(2)	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: March 13, 2009	/s/ Randall Gausman
	Randall Gausman
	Vice President and Chief Financial Officer

     A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.