TPMS, Car Reversing Radar, Ultrasonic Sensor manufacturer / supplier in China, offering 20-120mm 45Hz Sensor Switch R4 RS485 Digital Four-Wires Proximity Sensor for Liquid Level, 20-120mm 45Hz Sensor Switch U Voltage Analog Four-Wires Proximity Sensor for Liquid Level, 20-120mm 45Hz Sensor Switch I Current Analog Four-Wires Proximity Sensor for Liquid Level and so on.