Title :
Comparison of effectiveness of gas sensing by low frequency fluctuations in resistance and microbalance quartz gas sensors
Author :
Hasse, L. ; Kotarski, M. ; Smulko, J. ; Majzner, J. ; Sedlakova, V. ; Sedlak, P. ; Sikula, J.
Author_Institution :
Telecommun. & Inf., Gdansk Univ. of Technol., Gdansk, Poland
Abstract :
Selectivity and sensitivity of gas sensing can be improved by fluctuation enhanced sensing. This possibility was investigated in resistive Taguchi Gas Sensors (TGS). Research results confirm that such an approach can strongly increase gas detection sensitivity. We suppose that low frequency fluctuations can be utilized to improve gas detection in other types of gas sensors. Fluctuations in the Quartz Crystal Microbalance (QCM) gas sensor for gas detection improving have been investigated. The sensor used in an experiment utilizes an ordinary quartz oscillator with a surface covered by a chemical layer absorbing humidity. The paper presents results of 1/f noise measurements in both types of sensors at different humidity. The prototype QCM sensor and resistive gas sensors of Figaro company were investigated. The results show advantages of this technique for future industrial applications.
Keywords :
1/f noise; Taguchi methods; crystal oscillators; gas sensors; humidity; microbalances; noise measurement; sensitivity; 1/f noise measurement; QCM sensor; chemical layer absorbing humidity; gas detection sensitivity; gas sensing selectivity; low frequency fluctuation; microbalance quartz gas sensor; quartz crystal microbalance; quartz oscillator; resistive Taguchi gas sensor; Fluctuations; Frequency measurement; Gas detectors; Humidity; Noise; Noise measurement; Resistance; gas sensing; gas sensors; low-frequency fluctuations; quartz cristal microbalance; resistor gas sensors;
Conference_Titel :
Noise and Fluctuations (ICNF), 2011 21st International Conference on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4577-0189-4
DOI :
10.1109/ICNF.2011.5994318
