This sensor monitors rotational speed within the threshing mechanism of a combine harvester. It provides a pulsed signal to the machine's control system, which uses the data to detect blockages or belt slippage in the driven assemblies upstream of the sensor. When the sensor fails or its signal is interrupted, the control system typically logs a fault and may stop the feed chain or rotor to prevent mechanical damage. The sensor is manufactured to match the original component's mounting-hole pattern and trigger-wheel clearance, ensuring the air gap between the sensor tip and the rotating target remains within the required range for reliable signal generation.