Measuring and testing – Volume or rate of flow – By measuring electrical or magnetic properties
Patent
1993-02-02
1995-03-28
Chilcot, Jr., Richard E.
Measuring and testing
Volume or rate of flow
By measuring electrical or magnetic properties
7386108, G01F 158
Patent
active
054006597
ABSTRACT:
An electromagnetic flowmeter comprises a ceramic measuring tube through which fluid to be measured flows, a pair of electromagnetic coils disposed on the outer surface of the measuring tube in the central region thereof at diametrically opposite positions and generating a magnetic field in a direction perpendicular to the direction of flow of the fluid, a pair of measuring electrodes fixed to the outer surface of the measuring tube in the central region thereof at diametrically opposite positions and having electrode axes perpendicular to both the direction of flow of the fluid and the direction of the magnetic field, and a pair of metallic shields fixed to the outer surface of the measuring tube in surrounding relation to the measuring electrodes. A pair of the measuring electrodes and a pair of the metallic shields are fixed to the ceramic measuring tube by a reaction product due to an interface reaction with the ceramic measuring tube under heating.
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Arai Masatsugu
Ishihara Tamio
Kohno Akiomi
Sakurai Yutaka
Yokoi Kazuaki
Chilcot Jr. Richard E.
Dougherty Elizabeth L.
Hitachi , Ltd.
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