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Intelligent water meter is a new type of water meter which uses modern microelectronic technology, modern sensor technology and intelligent IC card technology to measure water consumption and carry out water data transmission and settlement transactions.

If the dial value minus the used value is less than 3 tons, it is normal. Because the performance parameters of the water meter will be tested in the production process, the mechanical part of the water meter will be rare when it leaves the factory. This

China's water meter industry started in the 1930s, and its development is very slow after it started. It was not until the early 1980s that China formulated a unified standard according to the international standard iso4040 for water meters at that time.