Highly Responsive CO2 Detection by an Improved & Compact Gas Sensor Using Mid-IR Spectroscopy

Authors

  • Mohd Rashidi Salim Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Bahru, Johor, Malaysia
  • Mohd Haniff Ibrahim Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Bahru, Johor, Malaysia
  • Asrul Izam Azmi Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Bahru, Johor, Malaysia
  • Muhammad Yusof Mohd Noor Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Bahru, Johor, Malaysia
  • Ahmad Sharmi Abdullah Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Bahru, Johor, Malaysia
  • Nor Hafizah Ngajikin Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Bahru, Johor, Malaysia
  • Hadi Manap Faculty of Engineering Technology, Universiti Malaysia Pahang, 26300 Kuantan, Pahang, Malaysia
  • Gerard Dooly Department of Electronic and Computer Engineering, University of Limerick, Limerick, Republic of Ireland
  • Elfed Lewis Department of Electronic and Computer Engineering, University of Limerick, Limerick, Republic of Ireland

Keywords:

Carbon Dioxide Sensor, Mid-Infrared, Responsivity, Spectroscopy,

Abstract

An improved and compact gas sensor using midinfrared spectroscopy for highly responsive Carbon Dioxide (CO2) detection is presented. The sensing principle is based on open-path direct absorption spectroscopy in the mid-infrared region. The improved reflective structure of optical gas sensor consists of low cost and compact components. Several gas cell configuration which includes SISO, 2-MISO, 4-MISO and 8- MISO were simulated using ZEMAX®12 using non-sequential ray tracing technique to get the optimum radius of the reflective curved surface. Sensitivity analysis has shown that the optimised structure of 4-MISO yields the highest sensitivity and power efficiency of -0.2895%-1 and 12.298% respectively. The developed gas sensing system using the optimised gas cell has shown the capability of accurately detecting CO2 concentration between 1.5% and 5.8% with no cross-sensitivity with other gases present in the gas cell. The newly developed CO2 sensor exhibits high responsivity with the recorded rise time and fall time of less than 1 second respectively.

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Published

2018-07-05

How to Cite

Salim, M. R., Ibrahim, M. H., Azmi, A. I., Mohd Noor, M. Y., Abdullah, A. S., Ngajikin, N. H., Manap, H., Dooly, G., & Lewis, E. (2018). Highly Responsive CO2 Detection by an Improved & Compact Gas Sensor Using Mid-IR Spectroscopy. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), 10(2-8), 1–7. Retrieved from https://jtec.utem.edu.my/jtec/article/view/4449

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