Back حساس كهروضوئي Arabic Fotoelektrik sensor Azerbaijani Sensor fotoelèctric Catalan Světelná závora Czech Lichtschranke German Sensor fotoeléctrico Spanish Sensore fotoelettrico Italian Electro-optische sensor LI အလင်း လျှပ်စစ်ကိရိယာ Burmese Czujnik fotoelektryczny Polish
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A photoelectric sensor is a device used to determine the distance, absence, or presence of an object by using a light transmitter, often infrared, and a photoelectric receiver. They are largely used in industrial manufacturing. There are three different useful types: opposed (through-beam), retro-reflective, and proximity-sensing (diffused).