Allen-Bradley 871P-DW15NP40-D4 Inductive Proximity Sensor

The Allen-Bradley 871P-DW15NP40-D4 Inductive Proximity Sensor is a 15 mm sensing-distance rectangular proximity sensor in the VersaCube™ family designed for non-contact detection of metallic objects in welding equipment, conveyors, and automated manufacturing lines. It provides a PNP, Normally Open (3-wire DC) output with a micro quick-disconnect (DC) connection and a rectangular housing with a 40 mm head. Its weld field immune construction supports reliable sensing in harsh environments, and it uses non-flush mounting. Operating voltage is typically 10–30 V DC (model dependent), and protection rating is IP-rated (model dependent). Common replacements include Allen-Bradley 872C-DH15NP30-D4, 871TM-B15N30-A2, and 872C-M8NP18-D4.