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Class 2 Low Power Residential DN15 DN20 DN25 Threaded Lorawan RS485 Pulse Integrated MID Ultrasonic Water Meter, Find Details and Price about Nb-IoT Ultrasonic Water Meter 4G Ultrasonic Water Meter from Class 2 Low Power Residential DN15 DN20 DN25 Threaded Lorawan RS485 Pulse Integrated MID Ultrasonic Water Meter - NINGBO XINGHANG METER TECHNOLOGY CO., LTD.