Electromagnetic flowmeter

Details Electromagnetic flowmeter Electromagnetic flowmeter

1979-07-05

1981-08-04

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring electrical or magnetic properties

G01F 158

Patent

active

042815525

ABSTRACT:
An electromagnetic flowmeter in which the fluid to be metered is conducted through a flow tube formed of nonmagnetizable metal and provided with an inner lining of electrical-insulating material. The fluid intercepts a transverse electromagnetic field established in the tube whereby the voltage induced in the fluid is transferred to a pair of electrodes disposed at diametrically-opposed positions on the tube to yield a signal indicative of flow rate. The electromagnet is constituted by at least one solid core surrounded by a coil to which a low-frequency excitation current is applied, the core having a cavity in a region therein which serves to reduce the mass of the core without, however, significantly affecting the intensity of the magnetic field produced thereby.

REFERENCES:
patent: 3827298 (1974-08-01), Kawamata et al.
patent: 4186600 (1980-05-01), Appel et al.

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