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Sensors 2011, 11(5), 5047-5057; doi:10.3390/s110505047

Performance of a CO2 Impedimetric Sensor Prototype for Air Quality Monitoring

1,* , 2
1 CEIT and Tecnun, University of Navarra, Manuel de Lardizábal 15, 20018 San Sebastian, Spain 2 CIDETEC, P. Miramón 196, 20009 San Sebastián, Spain
* Author to whom correspondence should be addressed.
Received: 25 March 2011 / Revised: 20 April 2011 / Accepted: 22 April 2011 / Published: 5 May 2011
(This article belongs to the Section Physical Sensors)
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Carbon dioxide detection is a relevant issue in many fields, and this work focuses on the use of a BaTiO3-CuO sputtered thin film layer in a gas sensor prototype for air quality measurements. For this, a double side sensor was fabricated, with a Pt heater on one side and the sensing layer over the electrodes on the other side. The uniformity of the temperature on the sensing layer was tested and further tests to check its sensing performance were carried out. Humidity influence in the detection was found to be almost negligible within the usual range in air quality measurements and repeatability tests show satisfactory results for air quality control purposes.
Keywords: carbon dioxide; air quality; thin film; BaTiO3-CuO carbon dioxide; air quality; thin film; BaTiO3-CuO
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.

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Mandayo, G.G.; Herrán, J.; Castro-Hurtado, I.; Castaño, E. Performance of a CO2 Impedimetric Sensor Prototype for Air Quality Monitoring. Sensors 2011, 11, 5047-5057.

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