The Use of the Heated Electrical Hygrometer with Sodium Chloride

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TypeArticle
Journal titleBuilding Research Note
ISSN0701-5232
Volume67
Pages4
AbstractThe heated electrical hygrometer usually consists of a pair of electrodes wound over a fabric covering on a tubular support. To begin operation a solution of salt, usually lithium chloride, is distributed over the surface. A voltage is applied to the electrodes and the heating that results from conduction through the salt solution raises the temperature and drives off some of the moisture. The resistance-moisture-content curve changes sharply at a point corresponding to the saturated solution, and a properly functioning unit will reach and operate at this condition, the temperature of the hygrometer adjusting automatically so that the water vapour pressure of the saturated solution is in equilibrium with the ambient water vapour pressure.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierBRN-67
NRC number6033
NPARC number20358683
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Record identifierbb6186d1-a8d5-4e8a-a371-8081f1edc040
Record created2012-07-20
Record modified2016-05-09
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