Gas viscosity sensor
US7730766B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2006 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Feb 6, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/225
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas viscosity sensor comprises a signal processing circuit and a sensor element, including a gas pressure generating system and a differential pressure measuring system in fluid communication therewith, the differential pressure measuring system comprising a measuring chamber (14) bounded by a thin membrane (28), an inlet-outlet channel or orifice interconnecting the measuring chamber to a source of gas for which the viscosity is to be determined, the inlet-outlet channel or orifice having dimensions adapted to provide resistance to the outflow and inflow of gas in the measuring chamber, and a membrane displacement sensor (32) adapted to measure a time dependent displacement of the membrane due to pressure variations in the measuring cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.