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Open AccessArticle

Electronic Nose with Digital Gas Sensors Connected via Bluetooth to a Smartphone for Air Quality Measurements

Industrial Engineering School, University of Extremadura, 06006 Badajoz, Spain
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Author to whom correspondence should be addressed.
Sensors 2020, 20(3), 786; https://doi.org/10.3390/s20030786
Received: 20 December 2019 / Revised: 29 January 2020 / Accepted: 30 January 2020 / Published: 31 January 2020
(This article belongs to the Special Issue Electronic Noses)
This paper introduces a miniaturized personal electronic nose (39 mm × 33 mm), which is managed through an app developed on a smartphone. The electronic nose (e-nose) incorporates four new generation digital gas sensors. These MOx-type sensors incorporate a microcontroller in the same package, being also smaller than the previous generation. This makes it easier to integrate them into the electronics and improves their performance. In this research, the application of the device is focused on the detection of atmospheric pollutants in order to complement the information provided by the reference stations. To validate the system, it has been tested with different concentrations of NOx including some tests specifically developed to study the behavior of the device in different humidity conditions. Finally, a mobile application has been developed to provide classification services. In this regard, a neural network has been developed, trained, and integrated into a smartphone to process the information retrieved from e-nose devices. View Full-Text
Keywords: electronic nose; gas sensors; smartphones; air quality; metal oxide electronic nose; gas sensors; smartphones; air quality; metal oxide
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MDPI and ACS Style

Arroyo, P.; Meléndez, F.; Suárez, J.I.; Herrero, J.L.; Rodríguez, S.; Lozano, J. Electronic Nose with Digital Gas Sensors Connected via Bluetooth to a Smartphone for Air Quality Measurements. Sensors 2020, 20, 786. https://doi.org/10.3390/s20030786

AMA Style

Arroyo P, Meléndez F, Suárez JI, Herrero JL, Rodríguez S, Lozano J. Electronic Nose with Digital Gas Sensors Connected via Bluetooth to a Smartphone for Air Quality Measurements. Sensors. 2020; 20(3):786. https://doi.org/10.3390/s20030786

Chicago/Turabian Style

Arroyo, Patricia; Meléndez, Félix; Suárez, José I.; Herrero, José L.; Rodríguez, Sergio; Lozano, Jesús. 2020. "Electronic Nose with Digital Gas Sensors Connected via Bluetooth to a Smartphone for Air Quality Measurements" Sensors 20, no. 3: 786. https://doi.org/10.3390/s20030786

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