Device for determining firstly a heat conductivity and/or the specific heat capacity of a gas mixture, and secondly a density and/or a viscosity of the gas mixture
US12306137B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2021 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Jun 4, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2697
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device includes: a chip, which includes a oscillatable cantilever with a first piezoelectric transducer for exciting cantilever oscillation, wherein the first cantilever extends into a cavity of the chip; a cantilever temperature sensor in an end section of the cantilever; a second temperature sensor spaced from the cantilever; a heating element located in the free end section of the cantilever and separated from the second temperature sensor by at least one cavity section; and an evaluation unit for determining density and viscosity as well as thermal conductivity and specific heat capacity of a gas mixture based respectively on oscillation characteristics of the cantilever and measured values of gas temperature from the cantilever temperature sensor, the second temperature sensor and a power consumption of the heating element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.