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An electronic sensing device used to detect weak electromagnetic radiation, typically light, and amplify its energy via the photoelectric effect.


(General Physics) a device sensitive to electromagnetic radiation, consisting of a photocathode, from which electrons are released by incident photons, and an electron multiplier, which amplifies and produces a detectable pulse of current


(ˌfoʊ təˈmʌl təˌplaɪ ər)

a light detector that amplifies a photon's signal by using a photocathode and a series of electrodes to create a cascade of electrons.
References in periodicals archive ?
The different optical fibres are connected to a 64-channel photo-multiplier tube, Philips X81722A.
The UV-3600 UV-VIS-NIR Spectrophotometer is equipped with three detectors: a photo-multiplier tube (PMT) for the UV-Vis region, and InGaAs and PbS detectors for the NIR region.
Once a desired cell is detected using a photo-multiplier tube detector, the cell is diverted via downstream individual high-speed valves to a separate channel for collection.
The voltage of the photo-multiplier tube (PMT) for the fluorescence channel was kept the same for the cell measurements as for MESF microbead measurements in both instruments.