1) long standby time, using a low-power LoRa/NB-loT module to support the meterreading communication 2) Anti-freezing, using imported nylon material instead of glass, will not appear frostcrack phenomenon below 3o0 °℃. 3) easy to maintain，the electronic backpack can be loaded and unloadedindependently by electromechanical separation design. 4) Conversion accuracy up to 1 liter,fully meets the needs of measurement andanalysis of water supply enterprises. 5) low-voltage alarm function.