The electromechanical valve controlled water meter can be widely used in ordinary wet water meters. It does not change the structure of traditional wet water meters and does not affect the measurement and sensitivity of traditional wet water meters. After the verification cycle of water meters, it is only necessary to replace the base meter of water meters; The decimal code disk decoding technology is adopted to more accurately read the mechanical position data of the code disk, and the non-traditional photoelectric is used to read the position data of the word wheel of the water meter. The module has no carry problems of word wheel 0 and 9, no critical state and fuzzy state, and the reading accuracy is 100%. The electronic part is installed in an independent fully sealed cavity, with a protection grade of IP68 and no light interference