Photoionization detector | Wikipedia audio article

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00:01:32 1 Principle
00:03:52 2 Lamp types and detectable compounds
00:04:45 3 Applications
00:06:30 4 Matrix gas effects



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SUMMARY
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A photoionization detector or PID is a type of gas detector.
Typical photoionization detectors measure volatile organic compounds and other gases in concentrations from sub parts per billion to 10 000 parts per million (ppm). The photoionization detector is an efficient and inexpensive detector for many gas and vapor analytes. PIDs produce instantaneous readings, operate continuously, and are commonly used as detectors for gas chromatography or as hand-held portable instruments. Hand-held, battery-operated versions are widely used in military, industrial, and confined working facilities for health and safety. Their primary use is for monitoring possible worker exposure to volatile organic compounds (VOCs) such as solvents, fuels, degreasers, plastics & their precursors, heat transfer fluids, lubricants, etc. during manufacturing processes and waste handling.
Portable PIDs are used for monitoring:

Industrial hygiene and safety
Environmental contamination and remediation
Hazardous materials handling
Ammonia detection
Lower explosive limit measurements
Arson investigation
Indoor air quality
Cleanroom facility maintenance