The water meter uses a magnet to connect and rotate, with high accuracy and stable transmission by wired remote transmission. It can realize real-time reading of water meter data, and the data presentation method is direct. It is a high-end product in today's society. The module adopts a new waterproof technology. Compared with the pulse water meter, the reading error can be reduced to zero, and it is an electronic remote meter with zero error of electromechanical conversion in the automatic meter reading system. And it adopts low-power design, and usually does not need power supply. It needs to be powered only when reading the meter. It can remotely control the on-off valve with fast aging and realize the prepaid function.