Repozytorium publikacji - Politechnika Gdańska

Purpose – This paper aims to present the methods of improving selectivity and sensitivity of resistance gas sensors. Design/methodology/approach – This paper compares various methods of improving gas sensing by temperature modulation, UV irradiation or fluctuation-enhanced sensing. The authors analyze low-frequency resistance fluctuations in commercial Taguchi gas sensors and the recently developed tungsten trioxide (WO3) gas-sensing layers, exhibiting a photo-catalytic effect. Findings – The efficiency of using low-frequency fluctuations to improve gas detection selectivity and sensitivity was confirmed by numerous experimental studies in commercial and prototype gas sensors. Research limitations/implications – A more advanced measurement setup is required to record noise data but it will reduce the number of gas sensors necessary for identifying the investigated gas mixtures. Practical implications – Fluctuation-enhanced sensing can reduce the energy consumption of gas detection systems and assures better detection results. Originality/value – A thorough comparison of various gas sensing methods in resistance gas sensors is presented and supported by exemplary practical applications.

Autorzy

• prof. dr hab. inż. Janusz Smulko link otwiera się w nowej karcie ,
• dr inż. Maciej Trawka,
• Claes Goran Granqvist,
• Radu Ionescu,
• Fatima E. Annanouch,
• Eduard Llobet,
• Laszlo B. Kish