Title :
Temperature-independent permeation tubes for gas sensor calibrators
Author :
Neri, G. ; Bonavita, A. ; Rizzo, G. ; Galvagno, S. ; Donato, N. ; Ipsale, S.
Author_Institution :
Dept. of Ind. Chem. & Mater. Eng., Messina Univ., Italy
Abstract :
A new temperature-independent set-up for gas sensors calibration making use of permeation tubes is proposed. The control of the output gas-phase concentration from the calibrator was made modulating the carrier flow through the permeation tube as a function of the temperature and dynamic of the tube by an entirely computer-controlled system. The study and results related to generation of calibrated gas-phase ethanol concentrations (from 1 to 500 ppm) and the calibration of a MOS (metal oxide semiconductor) gas sensor by this apparatus have been reported.
Keywords :
MIS devices; calibration; chemical variables measurement; gas sensors; MOS gas sensor; calibration; carrier flow modulation; computer-controlled system; gas sensor calibrators; gas-phase ethanol concentrations; metal oxide semiconductor; output gas-phase concentration; temperature-independent permeation tubes; Calibration; Computerized monitoring; Control systems; Ethanol; Fluid flow; Gas detectors; Temperature control; Temperature measurement; Temperature sensors; Weight control;
Conference_Titel :
Sensors, 2004. Proceedings of IEEE
Print_ISBN :
0-7803-8692-2
DOI :
10.1109/ICSENS.2004.1426272
