Image is Representational - See Manufacturer Specs | Reflective Optical Sensor 236.2" (6m) Module - Wire Leads. The PC50CNP06RP is a general purpose polarized retro-reflective sensor in a compact squared 17 x 50 x 50 mm reinforced PC/ABS-housing. It is useful in applications where basic sensors provide adequate sensing performance. The long sensing range in addition to sensitivity adjustment gives a very flexible sensor. Light and dark operation is switch selectable.