Date of Award:
Master of Science (MS)
Plants, Soils, and Climate
Gaylen L. Ashcroft
The hygroscopic and electrical resistance characteristics of lithium chloride are investigated. Then an evaluation is made of the lithium chloride characteristics that would be suitable in development of a dew point hygrometer with measurement accuracy of + 0. 3 c.
The development of a 12 volt battery-powered hygrometer is presented with circuit details and performance characteristics. Lithium chloride phase transition hygrometers tend to oscillate under certain conditions. A damping control is presented as part of the circuit details and recordings of the response characteristics and effectiveness of damping are presented showing effective control of the oscillations with a wide range of humidity transients.
Campbell, Curtis B., "Dew Point Hygrometer With Constant Resistance Humidity Transducer" (1969). All Graduate Theses and Dissertations. 2957.
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