Allen-Bradley 871T-R5J18 Inductive Proximity Sensor

The Allen-Bradley 871T-R5J18 is a stainless-steel, 18 mm-diameter tubular inductive proximity sensor with a 5 mm nominal sensing distance. Powered from 10 to 30 V DC, this 3-wire device provides a normally open, NPN (sinking) output, making it easy to wire directly to a PLC input. The shielded tubular design features a stainless steel barrel and face for rugged performance in harsh environments, while offering a compact form factor suitable for tight spaces on conveyors, automation cells, and machinery. As part of the 871T family, it is designed for metal-detection applications, with a sealed construction and compatibility with standard Allen-Bradley/Rockwell Automation control systems. Its 10–30 VDC supply range supports common industrial controllers, and its NO output is activated when a metal target enters the sensing field within approximately 5 mm of the face. This sensor is ideal for position sensing, end-of-travel detection, and proximity switching in equipment where a robust, stainless solution is required.