Electromagnetic flowmeter with capacitance type electrodes
US4658652A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1986 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Feb 14, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/584
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.