Patent ID: 9671260
Date: 2017-06-06
CPC Classifications: G01F

Claim:
1. A magnetically inductive flow meter, comprising: a first measuring section having a medium flowing through said first measuring section; a magnetic field generator; a first electrode arrangement for determining, as a first measuring signal in a galvanically contacting manner, a voltage which is induced via the first measuring section and which is dependent upon a flow rate of the medium flowing through the first measuring section; a controller/evaluator which control the magnetic field generator, determines a measured value for the flow rate and outputs the measured value for the flow rate dependent upon the first measuring signal; and a second electrode arrangement which determines, as a second measuring signal in a capacitive manner, a voltage which is induced via a second measuring section; wherein the controller/evaluator is configured so as to determine in each case a characteristic parameter of the first measuring signal and the second measuring signal and configured to determine and output a diagnostic indication dependent upon at least one of (i) the first parameter and (ii) the second parameter; wherein the first electrode arrangement and the second electrode arrangement are arranged in a tubular insert that is essentially formed from an electrically insulating material in which, at least in one measuring section of the first and second measuring sections, an essentially tubular metal mesh is embedded as a mechanical reinforcement; wherein the essentially tubular metal mesh is formed from a plurality of mesh parts that are galvanically insulated with respect to one another and of which at least two parts of the plurality of mesh parts are formed as capacitive measuring electrodes of the second electrode arrangement; and wherein an electrode of the first electrode arrangement is guided in each case through a center of the capacitive measuring electrodes and is galvanically insulated from the capacitive measuring electrode.