LIQUID FILM HYGROMETRY.
Final rept. 1 Feb 64-31 Jul 65.
WASHINGTON UNIV SEATTLE DEPT OF ATMOSPHERIC SCIENCES
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The report summarizes the final phase of development of a liquid film hygrometer. This instrument, which senses the partial pressure of water vapor of a sample gas flow, utilizes a heterogeneous mixture of a hygroscopic liquid coated on the surface of an inert granular solid as the dielectric of a capacitor. The resulting hygrometer has proven to be hysteresis-free and has a theoretically predictable behavior. Results of field tests with an engineering model are presented and discussed. Attempts to increase the sensitivity below the present 0.1 mb level are described and limitations in circuit design pointed out. Capabilities of the device are summarized. The reader is referred to Scientific Reports No. 1 AD-406 876 and No. 2 AD-604 340 for theoretical and technical details of the liquid film hygrometer. Author
- Test Facilities, Equipment and Methods