Photoelectric Sensors

(a.k.a. photo eye, retroreflective sensor, thru beam sensor, fiber optic sensor, laser sensors )

The basics: photoelectric sensors detect the distance, absence or presence of an object. This is done using a beam of light and is ideal when sensing long distances or when the object your are detecting is non-metal. Popular types include through beam, retroreflective and diffused and they can be used to detect almost all kinds of materials.
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