The principle of Ultrasonic Level Sensor is to measure the time it takes for an ultrasonic pulse to go from firing to returning. The distance from the liquid level to the sensor is calculated based on the time difference between the ultrasonic wave level meter emitting and receiving ultrasonic waves.
*Level range：5M, 10M, 15M, 20M, 30M
*Connection：4 wires (transmission distance≤100m)
*Material of table：Cast aluminum
*Material of meter：ABS engineering nylon
* Payment: T/T in advance or PayPal,Western Union.