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Article

Investigating a Low-Cost Dryer Designed for Low-Cost PM Sensors Measuring Ambient Air Quality

Department of Flue Gas Cleaning and Air Quality Control, Institute of Combustion and Power Plant Technology (IFK), University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany
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Author to whom correspondence should be addressed.
Academic Editor: Klaus Schäfer
Sensors 2021, 21(3), 804; https://doi.org/10.3390/s21030804
Received: 15 December 2020 / Revised: 21 January 2021 / Accepted: 21 January 2021 / Published: 26 January 2021
(This article belongs to the Special Issue Sensors for Air Quality Monitoring)
Air pollution in urban areas is a huge concern that demands an efficient air quality control to ensure health quality standards. The hotspots can be located by increasing spatial distribution of ambient air quality monitoring for which the low-cost sensors can be used. However, it is well-known that many factors influence their results. For low-cost Particulate Matter (PM) sensors, high relative humidity can have a significant impact on data quality. In order to eliminate or reduce the impact of high relative humidity on the results obtained from low-cost PM sensors, a low-cost dryer was developed and its effectiveness was investigated. For this purpose, a test chamber was designed, and low-cost PM sensors as well as professional reference devices were installed. A vaporizer regulated the humid conditions in the test chamber. The low-cost dryer heated the sample air with a manually adjustable intensity depending on the voltage. Different voltages were tested to find the optimum one with least energy consumption and maximum drying efficiency. The low-cost PM sensors with and without the low-cost dryer were compared. The experimental results verified that using the low-cost dryer reduced the influence of relative humidity on the low-cost PM sensor results. View Full-Text
Keywords: low-cost sensor; PM sensor; air quality sensor; low-cost dryer; humidity influence on PM; air pollutants; air quality monitoring low-cost sensor; PM sensor; air quality sensor; low-cost dryer; humidity influence on PM; air pollutants; air quality monitoring
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MDPI and ACS Style

Samad, A.; Melchor Mimiaga, F.E.; Laquai, B.; Vogt, U. Investigating a Low-Cost Dryer Designed for Low-Cost PM Sensors Measuring Ambient Air Quality. Sensors 2021, 21, 804. https://doi.org/10.3390/s21030804

AMA Style

Samad A, Melchor Mimiaga FE, Laquai B, Vogt U. Investigating a Low-Cost Dryer Designed for Low-Cost PM Sensors Measuring Ambient Air Quality. Sensors. 2021; 21(3):804. https://doi.org/10.3390/s21030804

Chicago/Turabian Style

Samad, Abdul, Freddy E. Melchor Mimiaga, Bernd Laquai, and Ulrich Vogt. 2021. "Investigating a Low-Cost Dryer Designed for Low-Cost PM Sensors Measuring Ambient Air Quality" Sensors 21, no. 3: 804. https://doi.org/10.3390/s21030804

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