The Honeywell RAEGuard 2 PID is a fixed photoionization detector designed for continuous monitoring of volatile organic compounds (VOCs) in hazardous environments. It operates on 10 to 28 VDC and provides a 4-20 mA analog output (three-wire) and RS-485 Modbus digital output. The digital PID sensor module supports multiple ranges and resolutions, with environmental self-adaptation for reliable performance.

The detector features a graphic display, local audible alarm, and LED status indicator. Three dry contact relays (high alarm, low alarm, fault) can be configured to trigger external alarms or process controls. A magnetic key interface allows calibration and parameter adjustment without opening the explosion-proof stainless steel enclosure. Applications include benzene monitoring in refineries, ammonia in industry, and solvent storage, with detection ranges from 0.01 to 1000 ppm depending on the sensor configuration.