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A Survey on Gas Sensing Technology

Xiao Liu, Sitian Cheng, Hong Liu and 3 more

Sensors · 2012 · Review · CC BY

doi:10.3390/s120709635

Abstract

Sensing technology has been widely investigated and utilized for gas detection. Due to the different applicability and inherent limitations of different gas sensing technologies, researchers have been working on different scenarios with enhanced gas sensor calibration. This paper reviews the descriptions, evaluation, comparison and recent developments in existing gas sensing technologies. A classification of sensing technologies is given, based on the variation of electrical and other properties. Detailed introduction to sensing methods based on electrical variation is discussed through further classification according to sensing materials, including metal oxide semiconductors, polymers, carbon nanotubes, and moisture absorbing materials. Methods based on other kinds of variations such as optical, calorimetric, acoustic and gas-chromatographic, are presented in a general way. Several suggestions related to future development are also discussed. Furthermore, this paper focuses on sensitivity and selectivity for performance indicators to compare different sensing technologies, analyzes the factors that influence these two indicators, and lists several corresponding improved approaches.

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    Kwon C.H., Yun D.H., Hong H., Kim S., Lee K., Lim H.Y., Yoon K.H. Multi-layered thick-film gas sensor array for selective sensing by catalytic filtering technology. Sens. Actuators B. 2000;65:327-330.

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    Jaegle N., Meisinger T., Bottner H., Muller G., Becker T., Braunmuhl C.B. Micromachined thin film SnO2 gas sensors in temperature-pulsed operation mode. Sens. Actuators B. 1999;57:130-134.

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    Seong J.K. The effect on the gas selectivity of CNT-based gas sensors by binder in SWNT/silane sol solutions. IEEE Sens. J. 2010;10:173-177.

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    Kim K.H. Performance characterization of the GC/PFPD for H2S, CH3SH, CH3SCH3, and CH3SSCH3 in air. Atmos. Environ. 2005;39:2235-2242.

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    Petculescu A., Hall B., Fraenzle R., Phillips S., Lueptow R.M. A prototype acoustic gas sensor based on attenuation. J. Acoust. Soc. Am. 2006;120:1779-1782.

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