The fundamental mechanism of a PD flow meter entails dividing the fluid flow into individual, measurable volumes. The meter is made of a chamber that traps a predetermined volume of fluid. Rotors, gears, pistons, or vanes in the chamber go in a specific sequence, pushed by the flow of fluid. https://jual-flow-meter-solar54197.blogsumer.com/29365692/flowmeter-tokico-an-overview