This photoelectric sensor is of the diffuse reflection type, using the reflections from an emitted light beam to detect objects directly. The transmitter and receiver are incorporated into a single M18 x 1 threaded housing, with the transmitter using the lower lens and the receiver using the upper lens. * Light on type * Range 400mm * LED Status indication * High contrast * Reverse polarity protection * Short-circuit and overload protection * Sensor uses red light to make setup easier * M12 Connector