Patent ID: 9395220
Filing Date: 2016-07-19
CPC Classification: G01F

Claim Text:
1. A magnetic inductive flow meter for measuring the flow of a flowing, conductive medium having a measuring tube made of a non-conductive material, having a magnetic field generating device for generating a magnetic field, in particular an alternating magnetic field, which penetrates the measuring tube essentially perpendicularly to the longitudinal axis of the measuring tube, having two measuring electrodes, in particular measuring electrodes that are galvanically coupled with the medium in order to tap a measuring voltage that is induced in the flowing medium, and having a capacitive measuring device for empty pipe detection, wherein the measuring electrodes are arranged along a connecting line that runs perpendicularly to the longitudinal axis of the measuring tube and perpendicular to the direction of the magnetic field, and wherein the compressive strength of the measuring tube is determined by the wall thickness or, respectively, the material thereof, wherein the measuring device for empty pipe detection comprises an electrode and a counter electrode, each of which has a sheet-like design, which form a measurement capacity C the measuring tube has a reduced wall thickness at least in the region of the electrode and of the counter electrode in order to maximize the measurement capacity C that the measuring tube is encased by a supportive housing made of metal, wherein in order to maintain the compressive strength of the measuring tube in the region of the reduced wall thickness between the electrode and the inner wall of the supportive housing, and between the counter electrode and the inner wall of the supportive housing, a support element having a hollow-walled design is arranged in each case in order to minimize the influence of parasitic capacitances on the measurement capacity C