photoelectric scanner

photoelectric scanner

[¦fōd·ō·i′lek·trik ′skan·ər]
(computer science)
A device that scans punched cards by photoelectric means, as opposed to the standard brushes or “feelers,” or mechanical plungers.
(control systems)
References in periodicals archive ?
A photoelectric scanner rejects false notes or those of wrong denomination....
"It includes a light source and a photoelectric scanner. It continuously monitors concentration and suspended solids by direct measurement in the pipe." According to Texas, this prevents the interface sometimes caused by condensation, color or temperature fluctuation.

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