Which monitoring device is capable of detecting volatile organic compounds (VOCs)?

Which monitoring device is capable of detecting volatile organic compounds (VOCs)?

• A. Photoionization detector (PID) or similar VOC detector
• B. Multigas meter only
• C. Radiation dosimeter
• D. Sound level meter

Answer: (A)

Volatile organic compounds are organic vapors, so detecting them requires a detector designed to respond to organic molecules. A photoionization detector uses UV light to ionize VOC molecules in the air; the resulting ions generate an electrical current that the instrument converts into a reading. This approach provides real-time measurements across a broad range of VOCs, often at ppm levels, which is exactly what HazMat teams need when assessing solvent fumes, gasoline vapors, and other organic hazards.

A multigas meter is built to monitor common gases, oxygen levels, and sometimes specific toxic gases; it isn’t inherently tuned for the wide spectrum of VOCs and may not detect them reliably unless it has a specialized VOC sensor, making it less suitable for identifying VOC presence. A radiation dosimeter and a sound level meter measure radiation exposure and noise, respectively, and do not respond to VOCs. Therefore, a PID or similar VOC detector is the appropriate choice for detecting volatile organic compounds.