Patent ID: 7412901

Claim:
A magnetic-inductive flow meter comprising: a measuring tube ( 1 ) made of metal through which flows a medium ( 4 ) which has a minimum electrical conductivity, the measuring tube ( 1 ) having an end face; an arrangement of magnets ( 5 ) for generating a magnetic field that permeates the medium ( 4 ); at least two measuring electrodes ( 6 ) arranged diametrically on the measuring tube ( 1 ) for sensing the inductively generated measuring voltage; an electrically insulating inner layer ( 7 ) disposed inside the measuring tube ( 1 ); and an electrically conductive grounding disk ( 8 ) being arranged at the end face of the measuring tube ( 1 ) for grounding the medium flowing through the measuring tube ( 1 ), which disk is connected to ground via the measuring tube, wherein the grounding disk ( 8 ′) consists of an electrically conductive elastomer and wherein the grounding disk ( 8 ′) engages the end face ( 2 ) of the measuring tube ( 1 ) so as to form a seal therewith and so as to be connected to ground.