RAE Systems Inc. (AMEX:RAE), a leading global provider of rapidly deployable sensor networks that enable customers to identify safety and security threats in real time, has been named to Deloitte's prestigious Technology Fast 50 Program for Silicon Valley, a ranking of the fastest-growing technology, media, telecommunications and life sciences companies in the area by Deloitte & Touche USA LLP, one of the nation's leading professional services organizations. Rankings are based on the percentage revenue growth over five years from 2001 to 2005. Over that period RAE Systems revenue grew from $19 million to $60.3 million or 217%.

?Sustaining high revenue growth over five years is an exceptional accomplishment," said Mark Jensen, National Director of the Venture Capital Services Group for Deloitte & Touche LLP. ?We commend RAE Systems for making the commitment to technology and delivering on the promise of market longevity. We are proud to honor RAE Systems as a Deloitte Technology Fast 50 winner.?

RAE Systems' CEO Robert Chen credits 18 patents in product and technology, innovation in sensors and wireless monitors, being a pioneer in developing solutions to meet the needs of the convergence of safety and security as well as global reach into Europe and China with RAE Systems' sustained growth.

RAE Systems' increase in revenues resulted in a ranking of 21 in the Scientific & Medical Equipment and Biotechnology category of the Technology Fast 50 for Silicon Valley and a ranking of 495 in the 2006 Technology Fast 500 annual list of the fastest-growing companies in North America.

To qualify for the Technology Fast 50, companies must have had operating revenues of at least $50,000 in 2001 and $5,000,000 in 2005, be headquartered in North America, and be a company that owns proprietary technology or proprietary intellectual property that contributes to a significant portion of the company's operating revenues or devotes a significant proportion of revenues to the research and development of technology. Using other companies' technology or intellectual property in a unique way does not qualify.

Winners of the 16 regional Technology Fast 50 programs in the United States and Canada are automatically entered in Deloitte's Technology Fast 500 program, which ranks North America's top 500 fastest-growing technology, media, telecommunications and life sciences companies. For more information on Deloitte's Technology Fast 50 or Technology Fast 500 programs, visit www.fast500.com.

This year's Silicon Valley Technology Fast 50 program is co-presented by Deloitte & Touche USA LLP and Silicon Valley Bank, Cooly Godward Kronish LLP, Korn/Ferry International and Porsche Motorsports.

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 multi-sensor chemical detection, radiation and digital video monitoring networks for homeland security and industrial applications. RAE Systems' products enable the military and first responders such as firefighters, law enforcement and other emergency management personnel to detect, provide early warning and record events that involve weapons of mass destruction and other hazardous materials. Industrial applications include the detection of toxic industrial chemicals, volatile organic compounds and petrochemicals. RAE Systems' products are used by many U.S. government agencies, including the Department of Homeland Security, the Department of Justice, and the Department of State, as well as all branches of the U.S. military, and by numerous city and state agencies. Our end users also include many of the world's leading corporations in the airline, automotive, computer and oil industries. Our products are used in civilian and government atmospheric monitoring programs in over 50 countries. For more information about RAE Systems, please visit www.RAESystems.com.

About Deloitte

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Deloitte & Touche USA LLP is the US member firm of Deloitte Touche Tohmatsu. In the US, services are provided by the subsidiaries of Deloitte & Touche USA LLP (Deloitte & Touche LLP, Deloitte Consulting LLP, Deloitte Financial Advisory Services LLP, Deloitte Tax LLP and their subsidiaries), and not by Deloitte & Touche USA LLP.