switching frequency < 2 kHz connection types cable, 2 m material (sensing face) PBT manufacter SKU IFRM 12N37X2/L protection class IP 67 hysteresis 3 ... 20 % of Sr nominal sensing distance Sn 4 mm output indicator LED red marking II 3D Ex tc IIIC T100°C Dc X reverse polarity protection yes voltage supply range +Vs 10 ... 30 VDC IFRM 12N37X2/L dimension 12 mm housing material brass nickel plated operating temperature Ta -25 ... +65 °C short circuit protection yes type cylindrical threaded mounting type flush housing length 40 mm current consumption max. (no load) 10 mA output current < 200 mA voltage drop Vd < 2 VDC output circuit NPN break function (NC)