Sensor for determining electrical characteristics of a flowing liquid
US5416425A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1992 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Nov 18, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/226
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor for measuring dielectric constant or resistivity of a flowing liquid, and especially of fuel mixtures for determining alcohol content, includes an inner tube through which the liquid flows, an outer sleeve about the inner tube in coaxial relation, holes in the inner tube to provide fluid communication at two locations to the space between the tube and the sleeve, and a partial restriction in the tube to divert some of the fluid flow into the space between the tube and the sleeve. The tube forms the inner electrode of a capacitor and the sleeve forms the outer electrode of the capacitor to measure dielectric constant. The ends of the sleeve are sealed in liquid tight fashion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.