Retro reflective sensors are photoelectric sensors. They consist of an emmitter and receiver in a single housing. The light produced by the emmitter is reflected back to the receiver with a reflector.
Whenever this light beam is obstructed, the output signal of the sensor changes state, photoelectric retro-reflective sensors for the detection of transparent objects are characterized by their long sensing ranges of up to 6 m on the IRR-7M reflector and their small housing. Combined with an extensive range of accessories, they provide a simple way to integrate sensors into systems.
