The classification principle of flow meter, there are many, according to the measuring principle, measuring method and the structure form and purpose, measuring medium and pipe diameter, displayed indicating value of classification is the main method. The classification of the water meter is basically according to these principles.
According to the measuring principle, according to the measurement principle is one of the main classification method. Water meter is used for measuring drinking cold water and hot water in a closed pipe actual volume, generally based on the principle of mechanical work, also can be based on the principle of machinery with electronic device, can also be based on the electromagnetic or electronic device, respectively called mechanical water meter, water meter with electronic devices and electronic water meter. Can generally be divided into mechanical water meter for the velocity of water meter and positive displacement meter.
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