IFM Electronics OGH281 background-suppressed diffuse reflection photoelectric sensor is made of zinc alloy, PEI housing, PEI sealing and PMMA lens. It features DC PNP electrical design, 10 to 30V DC operating voltage, 30mA current consumption. It is used for the direct detection of objects. As with a retro-reflective sensor transmitter and receiver are incorporated into one housing. The transmitter emits light which is reflected by the object to be detected and seen by the receiver. This system does not evaluate the interruption of the light beam but the reflected light of an object. The switching function referred to light-on mode is therefore reversed. The transmitted light of this system is also pulsed.