Title :
A microwave interferometer system for humidity measurement
Author :
Carullo, A. ; Ferrero, A. ; Parvis, M.
Author_Institution :
Dipt. di Elettronica, Politecnico di Torino, Italy
Abstract :
A microwave interferometer system for humidity measurement has been developed. The system is based on the sensitivity of the air permittivity to the water vapor content and offers a faster response and a better air pollution insensitivity with respect to the traditional humidity sensors which are based on hygroscopic substances. Experimental results show the effectiveness of the new approach in the range of 20% RH to 70% RH.
Keywords :
circular waveguides; humidity measurement; humidity sensors; microwave measurement; permittivity measurement; radiowave interferometers; waveguide transitions; air permittivity; fast response; holed circular waveguide; humidity measurement; microwave interferometer system; pollution insensitivity; water vapor content; waveguide to coaxial transitions; Air pollution; Atmospheric measurements; Calibration; Chemical sensors; Humidity measurement; Pollution measurement; System testing; Temperature sensors; Voltage; Water pollution;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.700039
