Allen-Bradley 871FM-D2NP11-Y3 Proximity Sensor Switch

The Allen-Bradley 871FM-D2NP11-Y3 Proximity Sensor Switch is a compact inductive proximity sensor that detects metallic objects without contact in tight automation spaces. Manufactured by Allen-Bradley (Rockwell Automation), it offers a 2 mm sensing distance and a PNP normally open output powered by 10–30 V DC, with a miniature rectangular housing (about 28 × 16 × 11 mm) designed for surface/flat mounting and available with Pico quick-disconnect or cable connections (model dependent). The sensor is shielded, supports up to ~600 Hz switching frequency, and carries industrial-grade IP-rated protection (model dependent; shielded design). It is commonly installed in compact machinery, conveyor lines, and automated assembly equipment where space is at a premium and non-contact metal detection is required, providing reliable switching for positioning and automation tasks; common replacements include Allen-Bradley 871FM-D2NP11-E2 and 871FM-D2NP11-P3 variants.