Patent ID: 7921736

Claim:
A magneto-inductive flow measuring device comprising: a measuring tube, through which a medium flows essentially in a direction of a measuring tube axis; a magnet arrangement, which produces a magnetic field passing through said measuring tube and extending essentially perpendicularly to said measuring tube axis; a first measuring electrode; a second measuring electrode, said measuring electrodes are positioned in said measuring tube on a connecting line, which is directed essentially perpendicularly to said measuring tube axis and to the magnetic field; and an evaluation/control unit, which ascertains, on the basis of a measurement voltage tapped on said measuring electrodes, the volume- and/or mass-flow of the medium through said measuring tube; wherein: said first measuring electrode comprises a first material, and said second measuring electrode comprises a second material different from the first material; and said control/evaluation unit ascertains the direct voltage portion of the voltages tapped on said two measuring electrodes relative to a reference potential, and said control/evaluation unit makes available, on the basis of said direct voltage portion, medium-specific information.