The Allen-Bradley 871TM-B4N12-N3 is a metal-face inductive proximity sensor with a 12 mm diameter, housed in a stainless-steel tubular body and an unshielded design. It operates as a 2-Wire AC/DC sensor with a normally open output and a Mini QD connector for quick field wiring. Sensing distance is 4 mm, with typical hysteresis of 7%, and its electrical characteristics include leakage current up to 1.9 mA at 120 V AC, inrush current up to 2 A (one cycle), and a load current rating of 5 mA. This rugged device is suited for non-contact metal-detection tasks in industrial automation where a compact, reliable sensor is needed.
