GFM-VS 0315

Positive displacement flow meters are volumetric flow sensors based on the meshing gear principle, where two or more gears rotate in close proximity, and are designed for use with fluids materials. Two precisely matched gear wheels are enclosed in a very accurately machined housing. Gear rotation is sensed by a non-contacting signal pick-up system, such as a magnetic or optical sensor. Each tooth produces one impulse. The spaces between the gear teeth form precisely defined measuring chambers when sealed by the housing. Fluid flow causes the gears to rotate, dividing the incoming flow into discrete volumes within the measuring chambers. Each rotation of one tooth pitch corresponds to a specific volume of fluid passing through the meter. 

This volume is known as the Volume/Impulse (Vm) and is stated in cubic centimeters per impulse (cc/Imp). The Volume/Impulse value is crucial for determining the flow rate capacity and resolution of the flow meter.