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.
Quartz-crystal-oscillator hygrometer
NASA Tech Briefs ; 1 , 3
1977-01-01
Miscellaneous
No indication
English
Aircraft Hygrometer Flight Test
NTIS | 1969
|TIBKAT | 1944
|NTRS | 1945
|High-Performance Miniature Hygrometer
Online Contents | 1994
OptiSonde chilled mirror hygrometer
Emerald Group Publishing | 2008