Leuze PRK 412M/P Polarized retro-reflective photoelectric sensor MSRP: Now: $143.00 Was: Polarized retro-reflective photoelectric sensor. Operating range limit: 0.15 ... 1.6 m; Light source: LED, Red; Switching frequency: 700 Hz; Supply voltage: 10 ... 30 V, DC; Digital switching... PRK 412M/P