Allen-Bradley 871L XNB15Q40 Inductive Proximity Limit Switch

Allen-Bradley 871L-XNB15Q40 is a Series 1, limit-switch style inductive proximity sensor that provides non-contact metal sensing in tight-space automation installations, offering the reliability of a mechanical limit switch with no moving parts. This 3-wire device features shielded construction and a Mini QD connector for quick, vibration-tolerant wiring, and it can be configured with either normally open or normally closed outputs via an NPN transistor. The model is specified for 10–60 V DC operation and is described as extended temperature capable, making it suitable for industrial environments where temperature fluctuations occur, dust is present, and electrical noise is a consideration, such as end-of-travel sensing and metal-presence signaling in machines, conveyors, and packaging lines.