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IoT Water Conductivity Sensor Lora 4G Wireless TDS Ec Transmitter for Smart Agriculture Water Management Systems RS485 Modbus 4-20mA Output, Find Details and Price about Water Conductivity Meter Ec Meter for Water from IoT Water Conductivity Sensor Lora 4G Wireless TDS Ec Transmitter for Smart Agriculture Water Management Systems RS485 Modbus 4-20mA Output - BGT Technology(Beijing) Co., Ltd.