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Proceedings 2017, 1(4), 471;

NO2 Measurements with RGB Sensors for Easy In-Field Test

MIND/IN2UB, Departament d’Enginyeries: Electrònica, Universitat de Barcelona, Barcelona, Spain
DIOPMA/IN2UB, Departament de Ciència de Materials i Química Física, Universitat de Barcelona, Barcelona, Spain
Institute of Semiconductor Technology, Braunschweig University of Technology, Braunschweig, Germany
Laboratory for Emerging Nanometrology LENA, Braunschweig, Germany
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
Author to whom correspondence should be addressed.
Published: 25 August 2017
(This article belongs to the Proceedings of Eurosensors 2017)
PDF [323 KB, uploaded 26 August 2017]


We present a simple an inexpensive method to implement a Griess-Saltzman-type reaction that combines the advantages of the liquid phase method (high specificity, fast response time) with the benefits of a solid implementation (easy to handle). We demonstrate that the measurements can be carried out using conventional RGB sensors; circumventing all the limitations around the measurement of the samples with spectrometers. We also present a method to optimize the measurement protocol and target a specific range of NO2 concentrations. We demonstrate that it is possible to measure the concentration of NO2 from 50 ppb to 300 ppm with high specificity and without modifying the sensing elements.
Keywords: NO2; sensors; colorimetry NO2; sensors; colorimetry
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Fernández, L.; Pons, A.; Monereo, O.; Benito-Altamirano, I.; Xuriguera, E.; Casals, O.; Fàbrega, C.; Waag, A.; Prades, J.D. NO2 Measurements with RGB Sensors for Easy In-Field Test. Proceedings 2017, 1, 471.

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