output indicator 4 port LED red type cylindrical threaded voltage supply range +Vs 10 ... 50 VDC short circuit protection yes IFRM 18P3701/S35L dimension 18 mm material (sensing face) PBT output current < 200 mA reverse polarity protection yes switching frequency < 500 Hz current consumption max. (no load) 10 mA protection class IP 67 housing length 50 mm connection types connector M8 mounting type quasi-flush output circuit PNP break function (NC) operating temperature -25 ... +75 °C voltage drop Vd < 3 VDC hysteresis 3 ... 25 % of Sr manufacter SKU IFRM 18P3701/S35L nominal sensing distance Sn 8 mm housing material brass nickel plated