New approaches for improving selectivity and sensitivity of resistive gas sensors: a review Academic Article uri icon


  • 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.

published proceedings


altmetric score

  • 6

author list (cited authors)

  • Smulko, J. M., Trawka, M., Granqvist, C. G., Ionescu, R., Annanouch, F., Llobet, E., & Kish, L. B.

citation count

  • 68

complete list of authors

  • Smulko, Janusz Marek||Trawka, Maciej||Granqvist, Claes Goran||Ionescu, Radu||Annanouch, Fatima||Llobet, Eduard||Kish, Laszlo Bela

publication date

  • September 2015