View our 7 PID sensors developed for the detection and monitoring of Volatile Organic Compounds in even the harshest of conditions.

Photoionisation Detectors (PID)

With a PID, the sample gas is exposed to deep ultraviolet light.

The emitted light ionises targeted gases and they are then detected by the PID electronics and reported as a concentration (ppb or ppm).

PIDs can measure Volatile Organic Compounds (VOCs) to very low concentrations. Considered the gold standard for VOC measurement,  Alphasense PIDs are compact and low power, with recently improved electronics and longer lamp life. An extended family of lamps now include better BTEX and chlorinated VOC detection.  These sensors are pin-replaceable with the 4P90 pellistor.

Alphasense PID Sensors

The Alphasense PID sensor range offers seven different models:








The sensors include a detector with lamp driver, amplifier circuitry, and user replaceable electrode stack, 10.6 eV lamp and particulate filter.

Application notes

Download PID Application Notes – see application notes for full details.

Data Sheets
File Description Type
PID-AY5 NEW Photoionisation detector 0-20ppm Data Sheet Download
PID-AR5 NEW Photoionisation detector 0-200ppm Data Sheet Download
PID-AH5 NEW Photoionisation detector 0-40ppm Data Sheet Download
PID-AH2 PhotoIonisation detector (ppb) Data Sheet Download
PID-AG5 NEW Photoionisation detector 0-10,000ppm Data Sheet Download
PID-A15 NEW Photoionisation detector 0-4,000ppm Data Sheet Download
PID-A12 PhotoIonisation detector (ppm) Data Sheet Download