Leuze electronic prk 3b stand retroreflective photoelectric sensor pol filt leuze electronic 50104694 a standard retroreflective photoelectric sensor with a polarisation filter that means objects with glossy surfaces can be easily and reliably detected a high switching frequency enables the detection of fast events and a sup2 ls active ambient light suppression improves performance by eliminating light interference fast and easy alignment of the sensor is possible using b i brightvis