Magnetic inductive flow meter having capacitive measuring device for empty pipe detection

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9395220
APP PUB NO 20150168188A1
SERIAL NO

14405309

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Abstract

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A magnetoinductive flowmeter for measuring the flow rate of a flowing, conductive medium with a capacitive measuring apparatus for detecting empty pipes is provided. In order to improve the detection of empty pipes and, in particular, the capacitive coupling to the medium, the invention provides for the measuring apparatus for detecting empty pipes to comprise a sheet-like electrode in each case and a counterelectrode which form a measurement capacitance CMess which is dependent on the medium and on the degree of filling of the measuring tube; for the measuring tube to have a wall thickness which is reduced in order to maximize the measurement capacitance CMess at least in the region of the electrode and the counterelectrode; and for the measuring tube to be surrounded by a metal supporting housing, wherein, in order to maintain the pressure resistance of the measuring tube, a hollow-walled supporting body for minimizing the influence of parasitic capacitances on the measurement capacitance CMess is arranged in each case in the region of the reduced wall thickness between the electrode and the inner wall of the supporting housing and between the counterelectrode and the inner wall of the supporting housing and supports the measuring tube against the supporting housing in each case.

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Patent Owner(s)

Patent OwnerAddress
IFM ELECTRONIC GMBHFRIEDRICHSTRASSE 1 45128 ESSEN 45128

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hoch, Werner Tettnang, DE 9 45
Körber, Markus Immenstaad, DE 3 21
Kreisel, Christian Kressbronn, DE 6 52
Kriesen, Ralf Amtzell, DE 4 21
Liehr, Sebastian Wasserburg, DE 4 25
Reichart, Walter Fronreute, DE 10 48

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