NDLI: Effect of Relative Humidity and Air Temperature on the Results Obtained from Low-Cost Gas Sensors for Ambient Air Quality Measurements

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Effect of Relative Humidity and Air Temperature on the Results Obtained from Low-Cost Gas Sensors for Ambient Air Quality Measurements

Content Provider	MDPI
Author	Daniel, Ricardo Obando Nuñez Samad, Abdul Castillo, Grecia Carolina Solis Laquai, Bernd Vogt, Ulrich
Copyright Year	2020
Description	Using low-cost gas sensors for air quality monitoring promises cost effective and convenient measurement systems. Nevertheless, the results obtained have a questionable quality due to different factors that can affect sensor performance. The most discussed ones are relative humidity and air temperature. This investigation aimed to assess the behavior of B4-series low-cost gas sensors from Alphasense for measuring CO, NO, NO2, and O3 for different levels of relative humidity and temperature. These low-cost gas sensors were tested for six relative humidity levels from 10% to 85% with increasing steps of 15% and four temperature levels of 10 °C, 25 °C, 35 °C, and 45 °C against reference instruments in the laboratory. The effect of these parameters on low-cost gas sensors was quantified in laboratory from which a correction algorithm was calculated, which was then applied to the field data. The applied algorithm improved the data quality of the low-cost gas sensors in most of the cases. Additionally, a low-cost dryer was assessed to reduce the influence of these factors on the low-cost gas sensors, which also proved to be suitable to enhance the data quality.
Starting Page	5175
e-ISSN	14248220
DOI	10.3390/s20185175
Journal	Sensors
Issue Number	18
Volume Number	20
Language	English
Publisher	MDPI
Publisher Date	2020-09-10
Access Restriction	Open
Subject Keyword	Sensors Characterization and Testing of Materials Low-cost Sensors Gas Sensors Air Quality Sensors Electrochemical Low-cost Sensors Air Pollutants Air Quality Monitoring
Content Type	Text
Resource Type	Article

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