产品名称（Product Name）：Valveless IoT water meter (iron shell, copper shell)

功能（Function）：

1.1 Metering and collection method: double reed switch pulse technology, photoelectric sensor technology (optional).

A. Adopt high-quality double reed switch and alternating working mode, which is equivalent to bistable mode, can effectively prevent metering errors caused by vibration and backflow, and can detect external magnetic field interference to ensure that the mechanical part and the electronic part count consistently.

B. Adopt photoelectric sensor technology to directly read the meter window value, accurate measurement, and ensure electromechanical consistency.

1.2 Retain the mechanical display mode to facilitate users to intuitively check the water consumption.

1.3 Electronic readings can automatically upload data to the server through wireless network telemetry communication, and remote data monitoring can be realized.

1.4 Adopt wireless communication, easy to install, no wiring required.

1.5 When the mechanical reading cannot be read normally or the battery is low, the water meter will actively upload the abnormal status to remind the management department that the water meter has failed.

主要技术参数（Main technical parameters）：

2.1 Maximum allowable working pressure: equal to 1.0MPa.

2.2 Metering characteristics

2.2.1 Level 2 water meter (accuracy level is level 2).

2.2.2 Within the water temperature range of 0.1℃ to 30℃, the maximum allowable error of the water meter is ±2% in the high zone (Q2≤Q≤Q4) and ±5% in the low zone (Q1≤Q＜Q2); when the water temperature is higher than 30℃, the maximum allowable error of the water meter is ±3% in the high zone (Q2≤Q≤Q4) and ±5% in the low zone (Q1≤Q＜Q2).

主要机械参数（Main mechanical parameters）：