GammaRAE II from RAE Systems is a personal radiation detector (PRD) that is certified as intrinsically safe, making it ideal for use in hazardous environments. The rugged device detects gamma radiation at extremely low levels and alerts first responders to the presence of radioactive material. It features fast response time and is immersible (IP-67) in water for easy decontamination. RAE Systems, Inc., San Jose, CA.