FLOW METER

摘要

A fluid flow meter (10) has two vanes (36, 38) moving through a chamber (26) along with the fluid for which the flow rate is to be measured. The vanes (36, 38) divide the flow into discrete volumes (64, 66) in order for the volume of fluid moving through the chamber to be determined. The vanes (36, 38) each rotate and move about a central axis whilst being constrained by a guide (48) rotating about an axis offset from the central axis.