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Evaluation of Two Soil Moisture Sensor Designs for Spaceflight Applications
Technical Paper
2002-01-2385
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A study was conducted evaluating the Temperature and Moisture Acquisition System (TMAS; Orbital Technologies, Madison, WI) and the Specific Heat Sensor (Thermal Logic, Pullman, WA) for root zone moisture level monitoring. Each design used a heat pulse and measured the transient temperature response to determine soil moisture changes. The sensors were placed in a polycarbonate compartment filled with oven-dried 1-2 mm Turface. Data was collected from the dry media, then the media was saturated with water and evaporation was monitored using the sensors and a digital balance. Generally, the TMAS sensors tended to over-estimate, while the Thermal Logic sensors under-estimated changes in soil moisture.
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Citation
Norikane, J., Tynes, G., Frazier, C., and Levine, H., "Evaluation of Two Soil Moisture Sensor Designs for Spaceflight Applications," SAE Technical Paper 2002-01-2385, 2002, https://doi.org/10.4271/2002-01-2385.Also In
References
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