A photoionization detector or PID is a type of gas detector.

The photoionization detector is an efficient and inexpensive detector for many gas and vapor analytes.

Typical photoionization detectors measure volatile organic compounds and other gases in concentrations from sub parts per billion to 10 000 parts per million (ppm).

Photoionization detector, (PID).

In a photoionization detector high-energy photons, typically in the ultraviolet (UV) range, break molecules into positively charged ions.

With its photoionization technology, the company provides photoionization detector (PID) that can help safety professionals monitor and measure volatile organic compounds (VOCs), combustible gases and vapors, and toxic gases.

In addition, when the helium discharge gas is doped with a suitable noble gas, such as argon, krypton, or xenon (depending on the desired cutoff point), the PDD can function as a specific photoionization detector for selective determination of aliphatics, aromatics, amines, as well as other species.