According to the measurement principle
Divided into speed water meters and volumetric water meters.
(1) Speed water meter: A water meter installed in a closed pipe, composed of a moving element, and directly obtained by the speed of the water flow to obtain the power speed.
Typical speed water meters are rotary-wing water meters and screw-wing water meters. There are single-flow water meters and multi-flow water meters in the rotary-type water meter.
(2) Volumetric water meter: A water meter installed in a pipeline, consisting of a volume of a known volume that is filled and discharged one by one, and a fluid-driven mechanism, or a quantitative discharge type water meter.
