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Vol. 168, Issue 4, April 2014, pp. 61-75




Gas Sensors: A Review

1, 2 Zainab Yunusa, 1 Mohd. Nizar Hamidon, 3 Ahsanul Kaiser, 4 Zaiki Awang

1 Institute of Advanced Technology, Universiti Putra Malaysia 43400 Serdang, Selangor, Malaysia
2 Department of Electrical Engineering, Bayero University Kano 3011 Kano, Nigeria
3 Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia 43400 Serdang, Selangor, Malaysia
4 Faculty of Electrical Engineering, Universiti Teknologi MARA 40150 Shah Alam, Selangor, Malaysia
1 Tel.: + 60182324583

1 E-mail: zee1yunusa@yahoo.com


Received: 2 November 2013 /Accepted: 7 March 2014 /Published: 30 April 2014

Digital Sensors and Sensor Sysstems


Abstract: In this paper a review of different technologies for gas sensors is presented. The different types of gas sensors technologies including catalytic gas sensor, electrochemical gas sensors, thermal conductivity gas sensor, optical gas sensor and acoustic gas sensor are discussed together with their principle of operation. The Surface Acoustic Wave Gas Sensor technology is discussed in greater detail. The advantages and disadvantages of each sensor technology are also highlighted. All these technologies have been used for several decades for the development of highly sensitive and responsive gas sensors for the detection of flammable and hazardous gases. However, for improved sensitivity and selectivity for these sensors, future trends and outlook for researchers are suggested in the conclusion of this article.


Keywords: Gas Sensor, Sensitivity, Selectivity, Surface Acoustic Wave.


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