Photoionization detector

Photo-ionization detectorphotoionization detector (PID)
A photoionization detector or PID is a type of gas detector.wikipedia
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Gas detector

gas sensorgas detectiongas sensors
A photoionization detector or PID is a type of gas detector.

Volatile organic compound

volatile organic compoundsVOCsVOC
Typical photoionization detectors measure volatile organic compounds and other gases in concentrations from sub parts per billion to 10 000 parts per million (ppm).
Similarly, a photoionization detector (PID) may also be used, though PIDs are less accurate.

Gas chromatography

gas chromatographgas-liquid chromatographyGC
PIDs produce instantaneous readings, operate continuously, and are commonly used as detectors for gas chromatography or as hand-held portable instruments.
Other detectors include the Hall electrolytic conductivity detector (ElCD), helium ionization detector (HID), infrared detector (IRD), photo-ionization detector (PID), pulsed discharge ionization detector (PDD), and thermionic ionization detector (TID).

Parts-per notation

ppmparts per millionppb
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

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

Hygiene

Flammability limit

lower explosive limitexplosive limitupper explosive limit

Photon

photonslight quantaincident photon
In a photoionization detector high-energy photons, typically in the vacuum ultraviolet (VUV) range, break molecules into positively charged ions.

Ultraviolet

UVultraviolet lightultraviolet radiation
In a photoionization detector high-energy photons, typically in the vacuum ultraviolet (VUV) range, break molecules into positively charged ions.

Molecule

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

Electric charge

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

Ion

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

Ionization

ionizedionizeionisation
As compounds enter the detector they are bombarded by high-energy UV photons and are ionized when they absorb the UV light, resulting in ejection of electrons and the formation of positively charged ions.

Electric current

currentelectrical currentcurrents
The ions produce an electric current, which is the signal output of the detector.

Signal

signalselectrical signalsignaling
The ions produce an electric current, which is the signal output of the detector.

Counter (digital)

counterdigital countercounters
The ions produce an electric current, which is the signal output of the detector.

Amplifier

amplifiersamplificationelectronic amplifier
The current is amplified and displayed on an ammeter or digital concentration display.