Electromagnetic flowmeter with shielded electrodes

Measuring and testing – Volume or rate of flow – System

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Details

G01F 158

Patent

active

039994430

ABSTRACT:
An electromagnetic flowmeter system capable of measuring fluids having any degree of conductivity, including fluids having dielectric properties. The fluid to be measured is conducted through a dielectrically-lined flow tube to intersect a transverse magnetic field produced by an electromagnet, thereby inducing a voltage in a pair of planar electrodes mounted within the dielectric lining, each electrode being provided with a driven shield. The electromagnet is excited by a direct voltage which is periodically interrupted to produce a periodic steady state field whereby unwanted in-phase and quadrature components are minimized.

REFERENCES:
patent: 2733604 (1956-02-01), Coulter
patent: 3759097 (1973-09-01), Cushing
patent: 3783687 (1974-01-01), Mannherz et al.

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