Title :
Microwave Humidity Sensor for Difficult Environmental Conditions
Author :
Toropainen, Anssi ; Vainikainen, Pertti ; Nyfors, Ebbe
Author_Institution :
Helsinki University of Technology, Radio Laboratory, Otakaari 5 A, SF-02150 ESPOO, Finland
Abstract :
The paper describes an electromagnetic humidity sensor based on a resonance perturbation technique. The sensor is capable of measuring humidity with a wide dynamic range in industrial environment and is insensitive for dust and dirt. The all-metal construction makes the sensor immune to damage by high temperatures. Measurement set-up for a resonance sensor and a construction of a microwave moisture meter are presented. Measurement results with the sensor mounted in a veneer dryer are reported.
Keywords :
Construction industry; Dynamic range; Electromagnetic measurements; Humidity measurement; Microwave measurements; Microwave sensors; Perturbation methods; Resonance; Sensor phenomena and characterization; Temperature sensors;
Conference_Titel :
Microwave Conference, 1987. 17th European
Conference_Location :
Rome, Italy
DOI :
10.1109/EUMA.1987.333788
