Patent ID: 7155983

Claim:
A magnetic flow meter comprising: a housing having a conduit formed therethrough, said conduit having an axis of flow; a pair of magnetic poles disposed on either side of said conduit in a diametrically opposed relationship, said pair of magnetic poles being located on and in alignment with a first lateral axis that substantially intersects said axis of flow; a pair of electrically shielded electrodes disposed on either side of said conduit in a diametrically opposed relationship, said electrodes being in fluid communication with said conduit and defining a second lateral axis that substantially intersects both said first lateral axis and said axis of flow; wherein each of said shielded electrodes has a longitudinal axis and is comprised of a central conductive member, an annular conductive member, and a shield member made from at least one electrically conductive material and arranged in a substantially concentric manner with said central conductive member located on said longitudinal axis and said annular member being located between said central conductive member and said shield member; said central conductive member and said annular conductive member separated by a first interstitial insulative member; and said central conductive member and said annular conductive member adapted to be coupled to a signal amplifier, said shield member adapted to be coupled to an electrical ground.