Description and testing of three moisture sensors for measuring surface wetness on carbonate building stones
Review of Scientific Instruments
By: R.B. See, M.M. Reddy, and R. G. Martin
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Abstract
Three moisture sensors were tested as a means for determining the surface wetness on carbonate building stones exposed to conditions that produce deposition of moisture. A relative-humidity probe, a gypsum-coated circuit grid, and a limestone-block resistor were tested as sensors for determining surface wetness. Sensors were tested under laboratory conditions of constant relative humidity and temperature and also under on-site conditions of variable relative humidity and temperature for eight weeks at Newcomb, NY. Laboratory tests indicated that relative humidity alone did not cause sensors to become saturated with water. However, the rates of drying indicated by the sensors after an initial saturation were inversely related to the relative humidity. On-site testing of the relative-humidity probe and the gypsum-coated ciruit grid indicated that they respond to a diurnal wetting and drying cycle; the limestone-block resistor responded only to rainfall.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Description and testing of three moisture sensors for measuring surface wetness on carbonate building stones |
| Series title | Review of Scientific Instruments |
| DOI | 10.1063/1.1139948 |
| Volume | 59 |
| Issue | 10 |
| Year Published | 1988 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Review of Scientific Instruments |
| First page | 2279 |
| Last page | 2284 |
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