Photointerrupters are optoelectronic devices used to detect the interruption of a light beam. Slot type photointerrupters consist of an LED and a phototransistor housed in a single package with a slot through which an object can pass. When the object interrupts the light beam, the phototransistor switches states, providing a signal output. These devices are used in various applications, including position sensing, speed detection, and object counting, providing reliable and precise detection in automation and control systems.
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