Surface Acoustic Wave Microhygrometer
972393
07/01/1997
- Event
- Content
- A microhygrometer has been developed at JPL's Microdevices Laboratory based on the principle of dewpoint/frostpoint detection. The surface acoustic wave device used in this instrument is approximately two orders of magnitude more sensitive to condensation than the optical sensor used in chilled-mirror hygrometers. In tests in the laboratory and on the NASA DC8, the SAW hygrometer has demonstrated more than an order of magnitude faster response than commercial chilled-mirror hygrometers, while showing comparable accuracy under steady-state conditions. Current development efforts are directed toward miniaturization and optimization of the microhygrometer electronics for flight validation experiments on a small radiosonde balloon.
- Pages
- 8
- Citation
- Hoenk, M., Cardell, G., Price, D., Watson, R. et al., "Surface Acoustic Wave Microhygrometer," SAE Technical Paper 972393, 1997, https://doi.org/10.4271/972393.