Calibration cell for calibration of gaseous or non-gaseous fluid constituent sensors
US4700560A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1986 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Aug 8, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0006
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A reference liquid-containing calibration cell for the calibration of a sensor for measuring a gaseous or non-gaseous constituent parameter of a fluid includes a chamber containing the reference liquid. The chamber is sealed to prevent loss of the reference liquid, and provides for communication between the sensor and a reference constituent present in the reference liquid. The chamber is provided with a gas-inleting port that is sealed by a first semi-permeable membrane. The first semi-permeable membrane is permeable to gaseous fluid constituents but impermeable to the reference liquid and to non-gaseous reference constituents present in the reference liquid. The chamber is further provided with a gas vent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.