Measuring and testing – Volume or rate of flow – System
Patent
1977-09-13
1979-02-06
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
System
G01F 158
Patent
active
041377672
ABSTRACT:
An electromagnetic flow meter using pairs of concentric electrodes mounted through a pipe line in an opposed facing relationship. The output flow signals from the electrodes are first differentially amplified with respect to a common reference signal and then the output signals from the first differential amplification are differentially amplified in two successive operations to produce a final flow signal having a value "n" times the output signal from a single pair of "n" facing electrodes.
REFERENCES:
patent: 3491593 (1970-01-01), Bailey
patent: 3589186 (1971-06-01), Bourg
patent: 4008609 (1977-02-01), Lambrecht et al.
Burton Lockwood D.
Halista Mitchell J.
Honeywell Inc.
Marhoefer Laurence J.
Ruehl Charles A.
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