Title :
Combined ammonia and hydrogen gas sensor
Author :
Knittel, Th ; Burgmair, M. ; Freitag, G. ; Zimmer, M. ; Eisele, I.
Author_Institution :
Inst. of Phys., Univ. der Bundeswehr Munchen, Neubiberg, Germany
Abstract :
A new read out circuit for FET based gas sensors has been designed. It enables an operation with reduced temperature and humidity drift and allows to measure an array of sensors with different sensitive layers on a common gate. Several sensors can be operated simultaneously in order to eliminate cross sensitivity and to detect more gases with one device at the same time.
Keywords :
ammonia; field effect transistors; gas sensors; hydrogen; readout electronics; FET based gas sensor; NH3; ammonia gas sensor; cross sensitivity elimination; gas detection; humidity drift; hydrogen gas sensor; read out circuit; sensor array measurement; Electrodes; Gas detectors; Gases; Humidity; Hydrogen; MOSFETs; Sensor arrays; Temperature dependence; Temperature sensors; Voltage;
Conference_Titel :
Sensors, 2003. Proceedings of IEEE
Print_ISBN :
0-7803-8133-5
DOI :
10.1109/ICSENS.2003.1278926
