Miniaturised Infrared Spectrophotometer for Low Power Consumption Multi-Gas Sensing
Scottish Universities Physics Alliance, Institute of Thin Films, Sensors and Imaging, University of the West of Scotland, Paisley PA1 2BE, UK
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Sensors 2020, 20(14), 3843; https://doi.org/10.3390/s20143843
Received: 7 June 2020
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Revised: 25 June 2020
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Accepted: 6 July 2020
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Published: 9 July 2020
(This article belongs to the Special Issue Low Cost Mid-Infrared Sensor Technologies)
Concept, design and practical implementation of a miniaturized spectrophotometer, utilized as a mid-infrared-based multi gas sensor is described. The sensor covers an infrared absorption wavelength range of 2.9 to 4.8 um, providing detection capabilities for carbon dioxide, carbon monoxide, nitrous oxide, sulphur dioxide, ammonia and methane. A lead selenide photo-detector array and customized MEMS-based micro-hotplate are used as the detector and broadband infrared source, respectively. The spectrophotometer optics are based on an injection moulded Schwarzschild configuration incorporating optical pass band filters for the spectral discrimination. This work explores the effects of using both fixed-line pass band and linear variable optical filters. We report the effectiveness of this low-power-consumption miniaturized spectrophotometer as a stand-alone single and multi-gas sensor, usage of a distinct reference channel during gas measurements, development of ideal optical filters and spectral control of the source and detector. Results also demonstrate the use of short-time pulsed inputs as an effective and efficient way of operating the sensor in a low-power-consumption mode. We describe performance of the spectrometer as a multi-gas sensor, optimizing individual component performances, power consumption, temperature sensitivity and gas properties using modelling and customized experimental procedures.
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Keywords:
lead selenide; micro hotplate; linear variable filter; fixed line pass band filters; photo detection; non-dispersive infrared spectroscopy
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MDPI and ACS Style
Muhiyudin, M.; Hutson, D.; Gibson, D.; Waddell, E.; Song, S.; Ahmadzadeh, S. Miniaturised Infrared Spectrophotometer for Low Power Consumption Multi-Gas Sensing. Sensors 2020, 20, 3843. https://doi.org/10.3390/s20143843
AMA Style
Muhiyudin M, Hutson D, Gibson D, Waddell E, Song S, Ahmadzadeh S. Miniaturised Infrared Spectrophotometer for Low Power Consumption Multi-Gas Sensing. Sensors. 2020; 20(14):3843. https://doi.org/10.3390/s20143843
Chicago/Turabian StyleMuhiyudin, Manu, David Hutson, Desmond Gibson, Ewan Waddell, Shigeng Song, and Sam Ahmadzadeh. 2020. "Miniaturised Infrared Spectrophotometer for Low Power Consumption Multi-Gas Sensing" Sensors 20, no. 14: 3843. https://doi.org/10.3390/s20143843
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