Description and testing of three moisture sensors for measuring surface wetness on carbonate building stones
Water-Resources Investigations Report
87-4177
By: R.B. See, M.M. Reddy, and R. G. Martin
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Abstract
Three sensors were tested on building stones exposed to conditions that produce deposition of moisture. A relative humidity probe, a gypsum collected 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 8 weeks at Newcomb, New York. Laboratory tests indicated that relative humidity alone did not cause sensors to become saturated. However, relative humidity did control the rate at which sensors dried after being saturated with distilled water. On-site testing of the relative humidity probe and the gypsum coated circuit grid indicated that they respond to a diurnal wetting and drying cycle; the limestone block resistor only responded to rainfall. (Author 's abstract)
Suggested Citation
See, R., Reddy, M., and Martin, R.G., 1987, Description and testing of three moisture sensors for measuring surface wetness on carbonate building stones: U.S. Geological Survey Water-Resources Investigations Report 87-4177, iv, 16 p. :ill. ;28 cm., https://doi.org/10.3133/wri874177.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Description and testing of three moisture sensors for measuring surface wetness on carbonate building stones |
| Series title | Water-Resources Investigations Report |
| Series number | 87-4177 |
| DOI | 10.3133/wri874177 |
| Year Published | 1987 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey, |
| Description | iv, 16 p. :ill. ;28 cm. |