Tank Entry Kit utilizes photoionization detector.

Press Release Summary:

MultiRAE Wing Tank Entry Kit improves safety of any aviation wing tank entry or service program. Fuel tanks of commercial and military aircraft contain many serviceable parts requiring confined space entry for repair and maintenance. Kit contains alarms, gas measurement scales, and calibration gases specifically for use in environments containing jet fuel vapors. MultiRAE Plus includes oxygen sensor and LEL sensor, providing backup reading for PID.

Original Press Release:

RAE Systems Extends Leadership in Photoionization Detectors with Launch of Air Craft Wing Tank Entry Kit

MultiRAE-based solution leverages company's leading PID technology to provide safety for wing tank entry and service programs

SUNNYVALE, Calif. - August 18, 2003 -RAE Systems Inc. (OTC BB: RAEE.OB), a leading provider of hazardous environment detection solutions for homeland defense, today announced the launch of the MultiRAE Wing Tank Entry Kit, a unique solution designed to improve the safety of any aviation wing tank entry or service program. Fuel tanks of both commercial and military aircraft contain many serviceable parts, and require regular confined space entry for repair and maintenance.

In the confined space of a fuel tank, the most common hazard is the jet fuel itself. Residual fuel is flammable, and can be ignited under certain temperature and vapor concentrations. In recent years, jet fuel has also been identified as a potential toxin with exposure limits of only 350mg/cubic liter or approximately 50 parts per million. Only the PID found in a MultiRAE has the necessary accuracy and alarms for this low level measurement. Other hazards to wing tank service personnel include the cleaning solvents, sealants, lubricants and other chemicals used in the repair and maintenance work.

RAE Systems' Wing Tank Entry Kit (RAE P/N: 009-3001-01N) is customized specifically for entering aircraft wing-tanks that have contained jet fuel. Its alarms, gas measurement scales and calibration gases are all specially tailored for use in environments containing jet fuel vapors.

RAE Systems has helped a number of major airlines, aircraft manufacturers and military services to create programs that utilize the MultiRAE's PID (Photoionization Detector) instead of traditional Wheatstone bridge LEL (Lower Explosive Limit) sensors for measuring jet fuel vapors and providing worker safety.

"Wheatstone bridge sensors are designed to measure methane, but not hydrocarbons. They are often not sensitive enough to accurately measure jet fuel vapors, and workers can often see and smell jet fuel although their monitor is not detecting anything," said Chris Wrenn, Director, Portable Products Business Unit and Government Programs for RAE Systems.

Continued Mr. Wrenn, "Since jet fuel is a mixture of hydrocarbons, PIDs are a far more accurate solution for LEL alarms in confined jet fuel tanks. Our highly sensitive PID sensors are less prone to false alarms, and this in turn provides users with greater confidence in their meter readings and greater confidence in their safety when entering a potentially hazardous environment."

The MultiRAE Plus used in RAE's Wing Tank Entry Kit also includes an oxygen sensor and a traditional LEL sensor that provides a backup reading for the PID. While the MultiRAE Plus has two additional toxic gas sensor sockets that may be filled with carbon monoxide, hydrogen sulfide or any two of RAE's ten toxic gas sensors, these two toxic sockets are not filled in the MultiRAE Wing Tank Entry Kit, since they are typically not required in this particular environment.

For more information about the Wing Tank Entry Kit, please visit
http://raesystems.com/wingtank.html, call 408-752 0723, or send an e-mail to RAESales@raesystems.com.

About RAE Systems
RAE Systems Inc. is the leader in rapidly deployable sensing networks for homeland defense and a leading manufacturer of portable, wireless and fixed atmospheric monitors, photo-ionization detectors, radiation detectors, gas detection tubes, sampling pumps and security monitoring devices. Our customers use our products to monitor gas and other volatile organic compounds in confined spaces, to establish a perimeter security around hazardous material sites and to detect the illicit traffic of radioactive materials. RAE Systems' customers operate in such industries as safety and security, oil and gas, pharmaceuticals, utilities, food, chemical, airlines, military and hazardous material storage and disposal, and its monitors are used in civilian and government atmospheric monitoring programs in over 40 countries. For more information about RAE Systems, please visit www.RAESystems.com

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