What is a photoelectric sensor?

Company: Omron
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Photoelectric sensors determine the distance, absence, or presence of physical objects by emitting a field or beam of electromagnetic radiation. An object is detected by measuring alterations in the return signal, which is achieved by sensors having an emitter for emitting light, and a receiver for receiving light.

There are three main types of photoelectric sensor, through-beam, retroreflective, and diffuse.

 

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