NASA NTRS · 19760000349
Quartz-crystal-oscillator hygrometer
Abstract
Measuring device, which eliminates complex and expensive optical components by electronically sensing dewpoint of water vapor in gas, employs piezoelectric crystal oscillator, supportive circuitry, temperature regulators, and readout.
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Kruger, R.. 1977-01-01. Quartz-crystal-oscillator hygrometer. https://ntrs.nasa.gov/citations/19760000349
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