Preprints
https://doi.org/10.5194/amt-2023-244
https://doi.org/10.5194/amt-2023-244
02 Jan 2024
 | 02 Jan 2024
Status: a revised version of this preprint was accepted for the journal AMT and is expected to appear here in due course.

Design and evaluation of a low-cost sensor node for near-background methane measurement

Daniel Furuta, Bruce Wilson, Albert A. Presto, and Jiayu Li

Abstract. We developed a low-cost methane sensing node incorporating two metal oxide (MOx) sensors, humidity and temperature sensing, data storage, and telemetry. We deployed the prototype sensor alongside a reference methane analyzer in two sites – one outdoors, one indoors – for several months each of data collection across a range of environmental conditions and methane levels. We explored calibration models to investigate the performance of our system and its suitability for background monitoring and enhancement detection. We achieved moderate performance in the 2 to 10 ppm range, but found that the sensor response varied over time, possibly as the result of changes in non-targeted gas concentrations. We suggest that this cross sensitivity may be responsible for mixed results in previous similar studies. We discuss the implications of our results for the use of these and similar inexpensive MOx sensors for near-background methane monitoring.

Daniel Furuta, Bruce Wilson, Albert A. Presto, and Jiayu Li

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2023-244', Anonymous Referee #1, 05 Jan 2024
    • AC1: 'Reply on RC1', Daniel Furuta, 05 Feb 2024
  • RC2: 'Comment on amt-2023-244', Anonymous Referee #2, 21 Jan 2024
    • AC2: 'Reply on RC2', Daniel Furuta, 27 Feb 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2023-244', Anonymous Referee #1, 05 Jan 2024
    • AC1: 'Reply on RC1', Daniel Furuta, 05 Feb 2024
  • RC2: 'Comment on amt-2023-244', Anonymous Referee #2, 21 Jan 2024
    • AC2: 'Reply on RC2', Daniel Furuta, 27 Feb 2024
Daniel Furuta, Bruce Wilson, Albert A. Presto, and Jiayu Li

Data sets

Data and code for "Design and evaluation of a low-cost sensor node for near-background methane measurement" Daniel Furuta, Bruce Wilson, Albert A. Presto, and Jiayu Li https://hdl.handle.net/11299/258238

Model code and software

Data and code for "Design and evaluation of a low-cost sensor node for near-background methane measurement" Daniel Furuta, Bruce Wilson, Albert A. Presto, and Jiayu Li https://hdl.handle.net/11299/258238

Daniel Furuta, Bruce Wilson, Albert A. Presto, and Jiayu Li

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Short summary
Methane is an important driver of climate change, and is challenging to inexpensively sense in low atmospheric concentrations. We developed a low-cost sensor to monitor methane and tested it in indoor and outdoor settings. Our device shows promise for monitoring low levels of methane. We characterize its limitations and suggest future research directions for further development.