Field replaceable electrode assembly for magnetic flowmeter

Claim 1

An electrode assembly adapted to be sealably installed on a meter body or the like, said meter body having a liner on the inside thereof of suitable electrical insulation material and an opening therethrough for accommodating said electrode assembly, said electrode assembly comprising a fitting adapted to be inserted through said opening and to extend outwardly from said meter body, said fitting having an axial bore therethrough, an enlarged head on the end thereof disposed within said meter body, and means for holding said head in sealable engagement with said liner, said assembly further comprising an electrode adapted to be inserted in and removed from said bore from the exterior of said meter body, said electrode being held within said bore in a sensing position in which it is in sensing relation with fluid flowing through said meter body, means for sealing said electrode with respect to said fitting, said head of said fitting and a portion of said electrode in sensing relation with the fluid flowing through said meter body being so structured as to be self-cleaned by the flow of fluid thereover, said head having a first surface adapted to sealably engage said liner proximate said opening and a second surface facing generally inwardly toward the center of said meter body, said second surface being generally conical-shaped with the central portion thereof projecting into said meter body more than the outer margins thereof, the portion of said second surface surrounding said bore extending through said fitting and the end of electrode in sensing relation with said fluid being generally coterminous.