Exhibit 99.1

Company Contact:		IR Agency Contact:
Investor Relations		Becky Herrick
408-952-8449		Lippert/Heilshorn & Associates, Inc.
investorrelations@raesystems.com		415-433-3777
		bherrick@lhai.com

RAE Systems Reports Fourth Quarter and Year-End 2010 Results

— Reports Fourth Quarter 2010 Net Income from Continuing Operations of $1.9 Million, or $0.04 per
Basic and Fully Diluted Share —

SAN JOSE, Calif. — March 22, 2011 — RAE Systems Inc. (NYSE AMEX: RAE), a leader in delivering innovative sensor solutions to serve industrial, energy, environmental and government safety markets worldwide, reported results for the fourth quarter and year-ended December 31, 2010.

Fourth Quarter 2010 Financial Results

For the fourth quarter of 2010, RAE Systems reported revenue from continuing operations of $23.3 million, compared with $21.1 million for fourth quarter of 2009. The Americas contributed 53 percent of total revenue, Asia contributed 29 percent and Europe contributed 18 percent. Gross margin from continuing operations for the quarter was 61 percent, compared with 53 percent for the same quarter of 2009. Total operating expenses for the fourth quarter 2010 were $13.3 million, including legal and financial advisory expenses of approximately $1.5 million related to the company’s previously announced merger with a private equity firm, compared with $10.7 million for the fourth quarter of 2009.

On January 13, 2011, the company announced that it had signed a definitive agreement to sell its interest in its RAE Fushun joint venture. As a result, the company is accounting for RAE Fushun as a discontinued operation in 2010. This transaction resulted in a net loss from discontinued operations in the fourth quarter of $4.6 million, or $0.08 per basic and fully diluted share. Income from continuing operations was $1.9 million, or $0.04 per basic and fully diluted share. The consolidated net loss for the quarter was $2.7 million, or $0.04 per basic and fully diluted share compared with net income of $968,000, or $0.01 per basic and fully diluted share in the fourth quarter of 2009.

The net income from continuing operations in the fourth quarter of 2010 was primarily due to a favorable income tax benefit of $1.1 million. The principal factors contributing to this benefit were an increase in the company’s China entities’ deferred tax assets due to a tax rate adjustment in China and a decrease in the current tax provision related to passage of new U.S tax legislation in the fourth quarter.

Full Year 2010 Financial Results

For the full year 2010, RAE Systems reported revenue from continuing operations of $87.1 million, compared with $75.0 million in 2009. The Americas contributed 54 percent of total revenue, Asia contributed 28 percent and Europe contributed 18 percent. For the full year 2010, gross margin from continuing operations was 60 percent compared with 53 percent for 2009. Total operating expenses for the full year 2010 were $46.3 million, including legal and financial advisory expenses of approximately $3.1 million related to the company’s previously announced merger with a private equity firm, compared with $43.5 million for 2009.

The 2010 net loss for the full year included a $7.8 million loss, or $0.13 per basic and fully diluted share from the discontinuation of the RAE Fushun joint venture. 2010 income from continuing operations was $5.3 million, or $0.09 per basic and fully diluted share. The consolidated net loss for the full year of 2010 was $2.6 million or $0.04 per basic and fully diluted share, compared with a net loss of $5.8 million, or $0.10 per basic and fully diluted share for the same period in 2009.

About RAE Systems

RAE Systems is a leading global provider of rapidly deployable sensor networks that enable customers to identify safety and security threats in real time. Products include disposable gas detection tubes, single gas personal monitors, multi-sensor chemical detection monitors, photoionization (PID) monitors for volatile organic compounds (VOCs), wireless gas detection systems, and radiation monitoring networks for energy production and refining, industrial and environmental safety, and public and government first responder security sectors. RAE Systems’ products are used in over 95 countries by many of the world’s leading corporations and by many U.S. government agencies. For more information about RAE Systems, please visit www.RAESystems.com.

Safe Harbor Statement

This press release may contain “forward-looking” statements, as that term is used in Section 21E of the Securities Exchange Act of 1934. Forward-looking statements include, without limitation: expressions of “belief,” “anticipation,” or “expectations” of management; statements as to industry trends or future results of operations of RAE Systems and its subsidiaries; and other statements that are not historical fact. These types of statements address matters that are subject to risks and uncertainties, which could cause actual results to differ materially. Factors that could cause or contribute to such differences include, but are not limited to, the general economic and industry factors, investigation and receptiveness of the market to RAE Systems and its products. In addition, our forward-looking statements should be considered in the context of other risk factors discussed in our filings with the Securities and Exchange Commission, including but not limited to our annual report on Form 10-K and Form 10-Q filings, available online at http://www.sec.gov. All forward-looking statements are based on information available to the company on the date hereof, and the company assumes no obligation to update such statements.

[Tables to Follow]

RAE Systems Inc.
Consolidated Balance Sheets
(in thousands, except share and par value data)
(unaudited)

		December 31,				December 31,
		2010				2009
ASSETS
Current assets:
Cash and cash equivalents		$	16,296			$	17,153
Restricted cash			2,000				2,000
Trade notes receivable			2,018				1,527
Accounts receivable, net of allowances of $3,539 and $2,675, respectively			14,286				14,735
Accounts receivable from affiliate			200				322
Inventories			11,546				9,308
Prepaid expenses and other current assets			4,557				3,339
Income taxes receivable			130				659
Current assets of discontinued operation			6,093				10,130
Total current assets			57,126				59,173
Property and equipment, net			10,730				7,582
Intangible assets, net			196				544
Investments in unconsolidated affiliates			184				358
Other assets			393				1,325
Noncurrent assets of discontinued operation			3,478				9,892
Total assets		$	72,107			$	78,874
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accounts payable		$	5,475			$	5,725
Accounts payable to affiliate			25				92
Bank lines of credit			1,814				4,026
Accrued liabilities			11,957				11,962
Notes payable to related parties, current			278				370
Income taxes payable			128				—
Deferred revenue, current			557				603
Current liabilities of discontinued operation			5,790				4,719
Total current liabilities			26,024				27,497
Deferred revenue, non-current			776				615
Deferred tax liabilities, non-current			141				—
Deferred gain on sale of real estate			3,809				4,444
Other long-term liabilities			1,491				761
Notes payable to related parties, non-current			—				363
Noncurrent liabilities of discontinued operation			182				1,639
Total liabilities			32,423				35,319
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY:
Common stock, $0.001 par value, 200,000,000 shares authorized; 59,512,064 and 59,438,328 shares issued and outstanding, respectively			59				59
Additional paid-in capital			65,041				63,832
Accumulated other comprehensive income			7,786				6,844
Accumulated deficit			(34,311	)			(31,706	)
Total RAE Systems Inc. shareholders’ equity			38,575				39,029
Noncontrolling interest			1,109				4,526
Total shareholders’ equity			39,684				43,555
Total liabilities and shareholders’ equity		$	72,107			$	78,874

RAE Systems Inc.
Consolidated Statements of Operations
(in thousands, except per share data)
(unaudited)

		Three Months Ended
		December 31,								Year Ended December 31,
		2010				2009				2010				2009
Net sales		$	23,341			$	21,138			$	87,053			$	74,993
Cost of sales			9,137				10,000				34,752				35,415
Gross profit			14,204				11,138				52,301				39,578
Operating expenses:
Sales and marketing			5,333				4,617				19,494				16,354
Research and development			1,847				1,549				7,077				5,956
General and administrative			6,084				4,534				19,691				21,149
Total operating expenses			13,264				10,700				46,262				43,459
Operating income (loss) from continuing operations			940				438				6,039				(3,881	)
Other income (expense):
Interest income			4				17				66				46
Interest expense			(51	)			(76	)			(185	)			(390	)
Other, net			(42	)			73				(177	)			277
Equity in gain (loss) of unconsolidated affiliates			(60	)			71				(173	)			(109	)
Income (loss) from continuing operations before income taxes			791				523				5,570				(4,057	)
Income tax (expense) benefit			1,124				946				(297	)			800
Income (loss) from continuing operations			1,915				1,469				5,273				(3,257	)
Discontinued operations:
Loss from discontinued operations, net of tax			(7,331	)			(683	)			(11,178	)			(3,457	)
Net loss attributable to the noncontrolling interest			2,721				178				3,342				952
Loss from discontinued operations			(4,610	)			(505	)			(7,836	)			(2,505	)
Net income (loss)			(2,695	)			964				(2,563	)			(5,762	)
Net income (loss) attributable to the noncontrolling interest			(42	)			4				(42	)			3
Net income (loss) attributable to RAE Systems Inc.		$	(2,737	)		$	968			$	(2,605	)		$	(5,759	)
Earnings per common share — basic:
Continuing operations		$	0.04			$	0.02			$	0.09			$	(0.06	)
Discontinued operations			(0.08	)			(0.01	)			(0.13	)			(0.04	)
Net loss per share — basic and diluted		$	(0.04	)		$	0.01			$	(0.04	)		$	(0.10	)
Diluted net loss per share
Continuing operations		$	0.04			$	0.02			$	0.09			$	(0.06	)
Discontinued operations			(0.08	)			(0.01	)			(0.13	)			(0.04	)
Diluted net loss per share		$	(0.04	)		$	0.01			$	(0.04	)		$	(0.10	)
Weighted average common shares outstanding — Basic			59,512				59,390				59,439				59,367
Stock options			477				179				136				—
Weighted average common shares outstanding — Diluted			59,989				59,569				59,575				59,367

The following table sets forth the components of our Consolidated Statements of Operations as a percentage of net sales:

		Three Months
		Ended December 31,								Year Ended December 31,
		2010				2009				2010				2009
Net sales			100	%			100	%			100	%			100	%
Cost of sales			39	%			47	%			40	%			47	%
Gross profit			61	%			53	%			60	%			53	%
Operating expenses:
Sales and marketing			23	%			22	%			23	%			22	%
Research and development			8	%			7	%			8	%			8	%
General and administrative			26	%			22	%			23	%			28	%
Total operating expenses			57	%			51	%			54	%			58	%
Operating income (loss) from continuing operations			4	%			2	%			6	%			-5	%
Other income (expense):
Interest income			0	%			0	%			0	%			0	%
Interest expense			0	%			0	%			0	%			0	%
Other, net			0	%			0	%			0	%			0	%
Equity in gain (loss) of unconsolidated affiliates			-1	%			0	%			0	%			0	%
Income (loss) from continuing operations before income taxes			3	%			2	%			6	%			-5	%
Income tax (expense) benefit			5	%			5	%			0	%			1	%
Income (loss) from continuing operations			8	%			7	%			6	%			-4	%
Discontinued operations:
Loss from discontinued operations, net of tax			-32	%			-3	%			-13	%			-5	%
Net loss attributable to the noncontrolling interest			12	%			1	%			4	%			1	%
Loss from discontinued operations			-20	%			-2	%			-9	%			-4	%
Net income (loss)			-12	%			5	%			-3	%			-8	%
Net (income) loss attributable to the noncontrolling interest			0	%			0	%			0	%			0	%
Net income (loss) attributable to RAE Systems Inc.			-12	%			5	%			-3	%			-8	%