Thermally activated calibration system for chemical sensors
US5970778A · kind A · utility
6Cited by
14References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1997 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Nov 12, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for remotely calibrating leak sensors. A supply of liquid analyte calibrant is stored in a reservoir, and is communicated to an outlet nozzle by a conduit having a throughbore. The conduit terminates in an outlet nozzle, and portion of the conduit defines a dosing chamber for storing a measured dose of the liquid calibrant. A thermal activator such as a resistive coil or a radio frequency unit is disposed adjacent the dosing chamber for applying a steep thermal gradient in order to bring the calibrant quickly to its boiling point such that the measured quantity is ejected from the outlet nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.