Allen-Bradley 871C-D5S18 Inductive Proximity Switch is a compact, 18 mm‑diameter sensor with a plastic face and plastic barrel, designed for metal detection in automation equipment. It is a shielded, two‑wire AC powered device with a normally closed output and a sensing distance of 5 mm, suitable for tight mounting in control panels or machinery. The sensor operates on 20–250 V AC, offering robust performance in industrial environments, and is part of the full‑featured 871C‑D series. A 2 m cable variant is commonly available to simplify wiring and integration into existing control circuits.
