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Continuous and real-time indoor and outdoor methane sensing with portable optical sensor using rapidly pulsed IR LEDs


Mahbub, P and Noori, A and Parry, JS and Davis, J and Lucieer, A and Macka, M, Continuous and real-time indoor and outdoor methane sensing with portable optical sensor using rapidly pulsed IR LEDs, Talanta, 218 Article 121144. ISSN 0039-9140 (2020) [Refereed Article]

Copyright Statement

© 2020 Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.talanta.2020.121144


We designed a simple, portable, low-cost and low-weight nondispersive infrared (NDIR) spectroscopy-based system for continuous remote sensing of atmospheric methane (CH4) with rapidly pulsed near-infrared light emitting diodes (NIR LED) at 1.65 μm. The use of a microcontroller with a field programmable gate array (μC-FPGA) enables on-the-fly and wireless streaming and processing of large data streams (~2 Gbit/s). The investigated NIR LED detection system offers favourable limits of detection (LOD) of 300 ppm (±5%) CH4,. All the generated raw data were processed automatically on-the-fly in the μC-FPGA and transferred wirelessly via a network connection. The sensing device was deployed for the portable sensing of atmospheric CH4 at a local landfill, resulting in quantified concentrations within the sampling area (ca 400 m2) in the range of 0.5%–3.35% CH4. This NIR LED-based sensor system offers a simple low-cost solution for continuous real-time, quantitative, and direct measurement of CH4 concentrations in indoor and outdoor environments, yet with the flexibility provided by the custom programmable software. It possesses future potential for remote monitoring of gases directly from mobile platforms such as smartphones and unmanned aerial vehicles (UAV).

Item Details

Item Type:Refereed Article
Keywords:near infrared light emitting diodes (NIR LED), non-dispersive infrared (NDIR) spectroscopy, remote continuous sensing of methane gas, wireless data transfer, on-the-fly automated data processing, real-time facile monitoring of gas
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Analytical spectrometry
Objective Division:Environmental Management
Objective Group:Air quality, atmosphere and weather
Objective Field:Air quality
UTAS Author:Mahbub, P (Dr Parvez Mahbub)
UTAS Author:Noori, A (Mrs Ansara Noori)
UTAS Author:Parry, JS (Mr John Parry)
UTAS Author:Davis, J (Mr John Davis)
UTAS Author:Lucieer, A (Professor Arko Lucieer)
UTAS Author:Macka, M (Professor Mirek Macka)
ID Code:148016
Year Published:2020
Web of Science® Times Cited:10
Deposited By:Geography and Spatial Science
Deposited On:2021-11-30
Last Modified:2022-08-22

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