Propeller water meters, sometimes called woltman types. The vane wheel type water meter inlude single jet water meter and the multi-jet water meter.Volumetric water meter:?A water meter, or a quantitative discharge meter, consisting of a number of chambers of known volumes that are successively filled and discharged from a fluid, and a fluid driven mechanism. The displacement water meter generally adopts the piston type structure.Types by Caliber SizeAccording to caliber is divided into large c