Electromagnetic flowmeter with capacitance type electrodes

Details Electromagnetic flowmeter with capacitance type electrodes Electromagnetic flowmeter with capacitance type electrodes

1986-02-14

1987-04-21

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

By measuring electrical or magnetic properties

7386114, G01F 158

Patent

active

046586520

ABSTRACT:
A magnetic flowmeter which includes a spool formed by a metallizable ceramic whose dielectric constant is at least 25 through which the fluid to be metered is conducted. The outer surface of the spool is metallized in its central region to define a pair of capacitative metering electrodes at diametrically-opposed positions, an electromagnetic field being established within the spool whereby when the flowing fluid intercepts this field, an emf is induced therein to produce a signal at the metering electrodes which is a function of flow rate. Overlying each metering electrode and projecting from the spool is a ceramic block whose outer surface is metallized to define a shield electrode which covers the metering electrode.

REFERENCES:
patent: 3839912 (1974-10-01), Schmoock et al.
patent: 4539853 (1985-09-01), Appel et al.

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