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Photoionization detector
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<p>A photoionization detector or PID is a type of <a href="/facts/Gas_detector/QHH5sQgp">gas detector</a>. </p><p>Typical photoionization detectors measure <a href="/facts/Volatile_organic_compound/BFMlKwgt">volatile organic compounds</a> and other gases in concentrations from sub <a href="/facts/Parts_per_billion/PozRuoLM">parts per billion</a> to 10 000 <a href="/facts/Parts_per_million/PozRuoLM">parts per million</a> (ppm). The <a href="/facts/Photoionization/HIJK2mHo">photoionization</a> 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 <a href="/facts/Gas_chromatography/kwLY8vt1">gas chromatography</a> 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 <a href="/facts/Volatile_organic_compounds/BFMlKwgt">volatile organic compounds</a> (VOCs) such as solvents, fuels, degreasers, plastics and their precursors, heat transfer fluids, lubricants, etc. during manufacturing processes and waste handling. </p><p>Portable PIDs are used for monitoring: </p> <ul><li>Industrial <a href="/facts/Hygiene/zH17q0L0">hygiene</a> and <a href="/facts/Safety/jyH5HLSg">safety</a></li> <li>Environmental <a href="/facts/Contamination/RC0L7KRy">contamination</a> and <a href="/facts/Environmental_remediation/S6wKBuhm">remediation</a></li> <li><a href="/facts/Dangerous_goods/mfe6Yv43">Hazardous materials</a> handling</li> <li><a href="/facts/Ammonia/MtLtJFtz">Ammonia</a> detection</li> <li><a href="/facts/Lower_explosive_limit/KkImQKor">Lower explosive limit</a> measurements</li> <li><a href="/facts/Arson/tzNIWYgd">Arson</a> investigation </li> <li><a href="/facts/Indoor_air_quality/qFtPo4Gk">Indoor air quality</a></li> <li><a href="/facts/Cleanroom/qa97Ff9p">Cleanroom</a> facility maintenance</li> <li>VOCs emitted by <a href="/facts/Table_Tennis/4dGt6tqM">Table Tennis</a> rackets</li></ul>