Wheelspeed Sensor with LED
Pi Research (12V) proximity wheel speed sensor (p/n 21A-0144) is triggered by passing a ferrous metal like a bolt head. The amber LED located where the wires enter the threaded section lights up each the sensor detects a trigger. WARNING - the threaded portion of the sensor is hollow so don't exceed 4Nm when tightening lock nuts. Sensing distance gap is between 0.4mm/.0157 & 4.0mm/.1575.