Patent ID: 7628080

Claim:
A magnetic flow meter for measuring the flow rate of a fluid through a tubular meter body having an axis, the apparatus comprising: at least one electromagnet operable to provide a magnetic field extending along a selected field direction perpendicular to the axis; at least one support member extending from an inner surface of the tubular meter body to an inner tube disposed coaxial with the meter body so as to define an inner flow path within the inner tube and a quasi-annular outer flow path disposed between the inner tube and the tubular meter body; at least one pair of electrodes, the two electrodes of each at least one pair disposed on opposite sides of the at least one supporting member so as to be spaced apart from each other along a line perpendicular to both the axis and to the selected field direction, each at least one pair of electrodes defining a respective voltage generating path extending circumferentially through the quasi-annular region from one electrode in the at least one pair thereof to the other; and measurement circuitry operable to measure a respective voltage generated along a respective at least one voltage generating path and to generate therefrom an output representative of the flow rate of the fluid through the tubular meter body.