A Survey on Gas Sensing Technology

被引：1144

作者：

Liu, Xiao ^{[1
]}

Cheng, Sitian ^{[1
]}

Liu, Hong ^{[1
]}

Hu, Sha ^{[1
]}

Zhang, Daqiang ^{[2
]}

Ning, Huansheng ^{[1
]}

机构：

[1] Beihang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China

[2] Nanjing Normal Univ, Sch Comp Sci, Nanjing 210097, Jiangsu, Peoples R China

来源：

SENSORS | 2012年 / 12卷 / 07期

关键词：

gas sensing methods; sensing materials; sensitivity; selectivity; THICK-FILM; SENSOR; DESIGN; LASER; TEMPERATURE; SENSITIVITY; PERFORMANCE; DEPOSITION; HYDROGEN; DIOXIDE;

D O I：

10.3390/s120709635

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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.

引用

页码：9635 / 9665

页数：31

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