Detection of the surface of a liquid or foam including moisture inhibiting
US4902962A · kind A · utility
14Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Nov 9, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/268
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an apparatus for detecting the surface of a liquid or foam, for example in a fermentation vessel a detector electrode (10) is surrounded at its lower end by a protective shroud (12) so as to protect a confined vapor space (14) surrounding the detector electrode. The vapor in the space (14) is maintained at a relatively low humidity either by heating the detector electrode or some other part of the apparatus or by purging the space (14) with a relatively dry air or gas. It is thereby ensured that no condensation onto the O-ring seal (20) and surrounding parts takes place. The shroud (12) also protects the parts from splashing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.