Detection of the surface of a liquid or foam including moisture inhibiting
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United States of America Patent
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Feb 20, 1990
Grant Date -
N/A
app pub date -
Nov 9, 1988
filing date -
Nov 5, 1988
priority date (Note) -
Expired
status (Latency Note)
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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.
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