Retro-reflective sensor

For a retro-reflective application, the transmitter and

receiver are incorporated into a single housing. A reflector is mounted

opposite to the sensor and returns transmitted light back to the receiver.

Compared to a thru-beam application, retro-reflective sensors are used for

medium range or average excess gain applications. “Light-operate” sensors

provide a signal when the beam is not interrupted(target not present).