Stopped Motion Monitor Sensor Signals "stopped condition" on conveyors, fans and all rotating machinery Inductive proximity sensor which detects rotating metal target Single trip set-point signal if no pulse is received w......Stopped Motion Monitor Sensor Signals "stopped condition" on conveyors, fans and all rotating machinery Inductive proximity sensor which detects rotating metal target Single trip set-point signal if no pulse is received within 4 seconds Non-contacting & failsafe. Compatible with the Whirligig