Retroreflective sensor (PRT) OQR50M-R300-2EP-V1, Retroreflective sensor with measurement core technology, Retroreflective Sensors, Pulse Ranging Technology (PRT), Optimized for use with fixed reflectors, Good alignability due to red transmission LED, Reliable detection of reflecting metall objects, Absolutely reliable background suppression, Presence detection, Reliable on reflective surfaces through polarization filter technology