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An electrical device that monitors motion in a given region by using a photoelectric cell to detect variations in the intensity of light.
(Electronics) another name for photocell
a solid-state electronic device that converts light into electrical energy by producing a voltage or that uses light to regulate the flow of current: used in automatic control systems for doors, burglar alarms, lighting, etc.
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|Noun||1.||electric eye - a transducer used to detect and measure light and other radiations|
detector, sensing element, sensor - any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner
photocathode - a cathode that emits electrons when illuminated
selenium cell - a photoelectric cell that uses a strip of selenium
transducer - an electrical device that converts one form of energy into another