Liquid density meter
US4307609A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 29, 1980 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Feb 29, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N9/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring the density of a liquid or of a suspension of solids in a liquid is disclosed. The apparatus comprises two pressure sensors adapted to be mounted in the liquid so that the two sensors are vertically at predetermined levels apart, a differential pressure transducer, and proper tubings including a differential pressure zeroing device interconnecting the pressure sensors to the differential pressure transducer, for providing an output proportional to the density of the liquid which is compensated for the differential pressure caused by the differential neight of said pressure sensors in the liquid. In a preferred embodiment of the invention, the differential pressure zeroing device is a pair of U-tubes filled with liquid and the tubings comprise gas filled tubings interconnecting one branch of each U-tube to respective pressure sensors and the other branch of each U-tube to the differential pressure transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.