Magnetic flowmeter

Details Magnetic flowmeter Magnetic flowmeter

1978-03-21

1979-10-02

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

System

G01F 160

Patent

active

041693752

ABSTRACT:
A magnetic flowmeter whose electromagnet is excited by a low-frequency excitation current, the flowmeter including flow tube electrodes yielding a flow rate signal. A reference voltage-detecting transformer is provided in the excitation circuit to produce a reference voltage that reflects fluctuations in the excitation current. Fluctuations in the flow rate signal as a result of fluctuations in the excitation current are eliminated by dividing the flow rate signal by the reference-voltage signal.

REFERENCES:
patent: 3570309 (1971-03-01), Birnstingl
patent: 3603146 (1971-09-01), Bennett et al.
patent: 3902366 (1975-09-01), Gruner
patent: 4059014 (1977-11-01), Torimaru

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