Diesel engine generator magnetic pick-up speed sensor MSP677

5/8-18UNF UNF 80mm Aviation Plug Speed Sensor Magnetic Pickup MPU MSP677 indicates when ring gear teeth, or other ferrous projections,pass the tip of the sensor.Electrical impulses are induced within the coil and sent to speed control unit.The signal from the magnetic speed sensor,teeth per second is directly proportional to engine speed.