Diesel Generator Speed Sensor 2 Output Terminals IP44 Magnetoelectric Rotating Speed Sensor 50V Item Type: Speed Sensor Material: Brass Operating Ambient Temperature: -30℃-120℃ Maximum Sensing Voltage: 50VAC Maximum Tightening Torsion: 49N.M Mounting Thread: M18-1.5x60mm, Approx. 60mm / 2.4in Output Signal: Switching Type Protection Grade: IP44 Linearity: 5(%F.S.) Hysteresis: 5(%F.S.) Repeatability: 0(%F.S.) Sensitivity: 100 Percent This product is a magnetoelectric tachometer, installed beside the flywheel of the engine, when the engine rotates, the tachometer senses an AC signal, the frequency of which is proportional to the engine speed. The speed sensor is used in conjunction with a tachometer (not included) to measure the engine speed.