reverse polarity protection yes, Vs to GND gear width > 6 mm front of sensor durable against pressure 20 bar housing length 60 mm sensor type hall sensor MHRM 12G2501 dimension 12 mm voltage drop Vd < 5 VDC current consumption max. (no load) 20 mA min. gear size > module 1 version full metal installation aid keyway operating temperature -40 ... +120 °C output B push-pull output A push-pull protection class (sensor) IP 67 type cylindrical threaded working distance max.