1 General Information
The RAEGuard 2 PID is a fixed photoionization detector (PID) that
measures a broad range of volatile organic compounds (VOCs). It
operates on 10 to 28 VDC and provides an analog (4-20mA) three-
wire signal output, and RS-485 Modbus digital signal output.
RAEGuard 2 PID uses an intelligent processing platform and digital
sensor technology, supports multiple ranges and resolutions, and can
perform off-line calibration and environmental self-adaptation.
RAEGuard 2 PID has a graphic display and local sound alarm and
light status indicator. A magnetic key interface enables the detector to
be calibrated and operational parameters adjusted with the explosion-
proof enclosure in place. In addition, the PID module can be easily
removed in hazardous locations for calibration or maintenance.
Key features:
• Digital Smart Sensor Technology
• Three wires, supports 4-20mA analog output
• Can operate with diffusion and flow-through modes and can be
used in most environments
• RS-485 digital communication in ModBus protocol
• Explosion-proof stainless-steel enclosure for hazardous
environment applications
• Magnetic-key interface eliminates the need to open the explosion-
proof housing when adjusting parameters.
• Matrix LCD of 128x64 supports graphic display
• Three-level switch signal outputs, normally closed/normally open
optional (30V load voltage, 2A)
• LED alarms when High or Low alarm point is reached
• Operation at 10 to 28 VDC
• Three dry contacts (<30V, 2A) normally open (or normally closed),
one for High and Low alarm, another for Fault alarm
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