Liquid level measuring system
US4418571A · kind A · utility
13Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1981 |
| Grant date | Dec 6, 1983 |
| Priority date | — |
| Expiry date | Dec 18, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/263
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid level measuring device has an outer capacitance tube, an imperforate glass tube coaxially within the outer tube defining a capacitor annulus between them, and an inner capacitor sleeve coaxially within the glass tube and having separate longitudinally extending sleeve sections. The separate sleeve sections cooperate with the outer capacitance tube to form a plurality of capacitor sections each having a separately measurable value which varies between dry minimum and submerged maximum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.