Calibration cell for the calibration of gaseous or non-gaseous fluid constituent sensors
US4635467A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1985 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | May 22, 2005 |
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 includes a gas-inleting port sealed by a first semi-permeable membrane which is permeable to a gaseous fluid constituent but impermeable to the reference liquid and non-gaseous reference constituents present in the reference liquid, the chamber further including a gas vent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.