RAEGuard 2 PID

The RAEGuard 2 PID is a fixed photoionization detector that can detect many volatile organic compounds (VOCs). Provides analog (4-20 mA) three-wire output and RS-485 Modbus digital output. Calibration and maintenance are greatly simplified because the PID module can be very easily detached in hazardous atmospheres. It has a graphical display of measurements, local audible alarms and an LED status indicator of the detector.

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Volatile Organic Compounds

Volatile Organic Compounds

Volatile organic compounds (abbreviated VOC) are organic compounds with high volatility at room temperature (i.e. low boiling point) and low solubility in water. Numerous VOCs are artificially created chemicals used in organic chemistry and are part of our daily lives (paints, drugs, refrigerants, solvents, petrochemicals, refinery processes, cleaners, printing industry, cosmetics and perfumes, etc.). Today's way and level of life quality would be impossible without the use of VOC compounds and their derivatives. Unfortunately, most of them are poisonous, flammable and pollutants - certainly dangerous to the environment and human health. We are exposed to VOC compounds every day, at home, at work or in nature, and their monitoring and detection in endangered areas are crucial for our safety. EU directives, the most important of which is 1999/13 / EC, regulate the limits of exposure to VOC compounds in many industries. Monitoring of VOC compounds is crucial for a safe working atmosphere and human health.

Detection of VOC compounds in the domain of toxicity is performed using special photo ionization detectors (PID) which, with the help of a wide base of compounds within the device itself, focus on a specific VOC. The standard for calibration of these sensors is usually Isobutylene gas, (CH3) 2C = CH2. Alarm and STEL / TWA limits are specific to each compound and determined empirically or through national / EU directives.

Detection of the VOC flammability domain (0-100% LEL) is usually performed by means of fast IR detectors that are factory calibrated to a specific hydrocarbon.

  • Diffuse model available for high humidity conditions and pump model
  • Easy separation of PID modules without the use of tools
  • Robust design conditions its longer service life
  • Continuous real-time VOC monitoring
  • Faster response due to integrated sampling pump
  • Guaranteed accurate readings even in high humidity conditions
  • Dimensions: 25.7 x 20.1 x 10.7 cm
  • Weight: 3.5 kg
  • Operating temperature: -20 to +50 ° C
  • Self-test of sensors, battery and visual / audible alarms when turned on
  • IP 65 degree of protection
  • ATEX Zone 0
  • Refineries
  • Chemical and petrochemical plants
  • Chemical and solvent storage facilities
  • Pharmaceutical industry
  • Printing houses
  • Varnish, paint and coating industry
  • Medicine, pathology, histology


  • Calibration adapter
  • Mounting kit for 2 “pipe
  • Sensor protection options from external influences
Title Date File size
RAEGuard2 PID User Guide 15.03.2021. 3.34 MB
RAEGuard 2 EU DofC 15.03.2021. 206 KB
HIS_Gas_RAEGuard20220PID_DS_EMEA_0419_FINAL 21.10.2021. 416.7 KB