is another member of velocity? type water meter besides single jet water meter, Multi jet water meter mostly applied in residential area and famous for accurate measurements.it is for smaller commercial places,seldom used in places where high flow of water is demanded.?Basic Information:Caliber Size: 15mm-50mmWork Enviroment: Dry Dial, wet dial or hermetically sealedCategory: Velocity water meter, Vane wheel typeMaterial: Cast Iron, Brass..Cert: ISO4064Accuracy Class: BTemp range: 0 °C to 30