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Open AccessArticle

Development of a Hydrogen Gas Sensor Using a Double Saw Resonator System at Room Temperature

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Institute of Advanced Technology, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
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Department of Electrical Engineering, Bayero University Kano, P.M.B 3011 Kano, Nigeria
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Department of Computer and Communications, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
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Department of Electrical and Electronics Engineering, Faculty of Engineering, Universiti Putra Malaysia 43400 Serdang, Selangor, Malaysia
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Department of Mechanical and Manufacturing Engineering, Faculty of Engineering Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
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Faculty of Engineering, Multimedia University, 63100 Cyberjaya, Selangor, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Gerhard Lindner
Sensors 2015, 15(3), 4749-4765; https://doi.org/10.3390/s150304749
Received: 8 October 2014 / Revised: 3 November 2014 / Accepted: 15 December 2014 / Published: 26 February 2015
(This article belongs to the Special Issue Acoustic Waveguide Sensors)
A double SAW resonator system was developed as a novel method for gas sensing applications. The proposed system was investigated for hydrogen sensing. Commercial Surface Acoustic Wave (SAW) resonators with resonance frequencies of 433.92 MHz and 433.42 MHz were employed in the double SAW resonator system configuration. The advantages of using this configuration include its ability for remote measurements, and insensitivity to vibrations and other external disturbances. The sensitive layer is composed of functionalized multiwalled carbon nanotubes and polyaniline nanofibers which were deposited on pre-patterned platinum metal electrodes fabricated on a piezoelectric substrate. This was mounted into the DSAWR circuit and connected in parallel. The sensor response was measured as the difference between the resonance frequencies of the SAW resonators, which is a measure of the gas concentration. The sensor showed good response towards hydrogen with a minimum detection limit of 1%. View Full-Text
Keywords: double SAW resonator; hydrogen gas sensor; polyaniline and carbon nanotubes double SAW resonator; hydrogen gas sensor; polyaniline and carbon nanotubes
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MDPI and ACS Style

Yunusa, Z.; Hamidon, M.N.; Ismail, A.; Isa, M.M.; Yaacob, M.H.; Rahmanian, S.; Ibrahim, S.A.; Shabaneh, A.A. Development of a Hydrogen Gas Sensor Using a Double Saw Resonator System at Room Temperature. Sensors 2015, 15, 4749-4765.

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