Title :
Design of sensor setup and study of humidity sensing behaviour of conducting polyaniline / ceramic composites
Author :
Machappa, T. ; Anilkumar, Koppalkar R. ; Sasikala, M. ; Prasad, M. V N Ambika
Author_Institution :
Dept. of Phys., Gulbarga Univ., Gulbarga
fDate :
Nov. 30 2008-Dec. 3 2008
Abstract :
Sensor setup for the measurement of humidity was designed using square glass chamber provided with sample holder, vaporizer, hygrometer and temperature display. Using this set up, authors have studied the response time of the sensor setup and humidity sensing properties for Polyaniline (PANI) and PANI/sodium metavanadate (NaVO3) composites. The variation in electrical resistance with change in relative humidity (RH) in the range between 20 to 95% of RH is reported and this may be due to change in surface electrical resistance. The variation in resistance and hence conductivity depends on capillary condensation of water causing ionic conductivity within the sensing materials.
Keywords :
ceramics; composite materials; humidity sensors; ionic conductivity; glass chamber; humidity sensing behaviour; hygrometer; ionic conductivity; polyaniline-ceramic composites; relative humidity; sample holder; sensor setup; temperature display; vaporizer; Ceramics; Conducting materials; Conductivity; Delay; Displays; Electric resistance; Glass; Humidity measurement; Surface resistance; Temperature sensors; Ceramics; Humidity sensor; Polyaniline; Time response;
Conference_Titel :
Sensing Technology, 2008. ICST 2008. 3rd International Conference on
Conference_Location :
Tainan
Print_ISBN :
978-1-4244-2176-3
Electronic_ISBN :
978-1-4244-2177-0
DOI :
10.1109/ICSENST.2008.4757114