RAE Systems Provides Public Venue Security for World Series Baseball Games in St. Louis

SUNNYVALE, Calif. November 3, 2004 RAE Systems Inc. (AMEX: RAE), a leading global developer and manufacturer of rapidly-deployable, multi-sensor chemical and radiation detection monitors and networks for homeland security and industrial applications, today announced that it
provided toxic gas monitoring for the World Series games that took place in St. Louis at Busch Stadium.

Teams from St. Louis Urban Area Security Initiative worked together to ensure that the air on the field, near the dugouts and throughout the stadium was safe and secure for the more than 50,000 fans, players and press in attendance. Participating organizations included the St. Louis Fire Department, St. Louis County HMERT/WMD, the National Guard 7th Civil Support Team from Ft. Leonard Wood, and other local, state and Federal agencies

The sensing solutions provided by RAE Systems were indispensable to our efforts in providing a safe, secure environment for the World Series, an event that has become an American institution, said Bill Brandes, Commander, St. Louis County HMERT/WMD. Our ability to protect lives is
in many ways dependent on our ability to assess and act on the data we have at any given moment. The real time information provided by RAE Systems sensing solutions gives us better and faster data, which is critical to better and faster response.

Networks of AreaRAEs were deployed throughout Busch Stadium to provide parts-per-million measurement of volatile organic compounds (VOCs), as well as lower explosive limit (LEL), oxygen, and specific toxic substances. The AreaRAEs were controlled and monitored from a series of base controllers running ProRAE Remote software, each monitoring
real-time data from up to 32 sensors.

The World Series is one of the many high profile events where RAE Systems solutions are used to ensure public security, said Robert I. Chen, CEO of RAE Systems. In our interconnected world, protecting public venues has become integral to our way of life, and RAE Systems is proud to be of service to the HazMat teams that work diligently to
secure these important sites and events.

About RAE Systems
RAE Systems is a leading global developer and manufacturer of rapidly deployable, multi-sensor chemical detection monitors and networks for homeland security and industrial applications. In addition, RAE Systems offers a full line of portable single-sensor chemical and radiation detection products. RAE Systems products enable the military and first
responders such as firefighters, law enforcement and other emergency management personnel to detect and provide early warning of 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 worlds 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

Safe Harbor Statement
This press release contains “forward-looking” statements, as that term is used in Section 21E of the Securities Exchange Act of 1934. Forward-looking statements are denoted by such words as expected to increase. 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 and receptiveness of the market to RAE 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.