MAGNETIC-INDUCTIVE MEASUREMENT APPARATUS FOR FLOWING MEDIA

PCT No. PCT/EP95/03925 Sec. 371 Date Apr. 4, 1997 Sec. 102(e) Date Apr. 4, 1997 PCT Filed Oct. 5, 1995 PCT Pub. No. WO96/11384 PCT Pub. Date Apr. 18, 1996The invention concerns a magnetically inductive flow meter for flowing media with a tube consisting of ceramic material and used as a measurement line, a magnet to produce a magnetic field running at least essentially perpendicular to the tube axis, at least two measuring electrodes arranged preferably perpendicular to the tube axis and preferably perpendicular to the direction of the magnetic field and at least two screening or shielding electrodes shielding the measuring electrodes from outer electrical fields, wherein the measuring electrodes and the screening or shielding electrodes are placed outside the tube. The shielded magnetically inductive flow meter is characterized in that there is a layer consisting of a ceramic material surrounding the tube, that the measuring electrodes are arranged essentially inside the layer and especially on the border between the layer and the tube, and that the screening or shielding electrodes inside the layer, especially on the border between the layer and the tube and especially on the outer surface of the layer are arranged so that the screening or shielding electrodes shield the measuring electrodes from the outside.