Sensor, Oil Pressure Sensor, Water Level Sensor manufacturer / supplier in China, offering Holykell Hpt604 SDI-12 RS485 RS232 Water Treatment Liquid Pressure Level Transmitter, Holykell RS485 RS232 Submersible Water Level Sensor for Iot Platform Hpt604, Holykell 5m Throw in Seawater Wastewater Level Sensor and so on.