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Updated: May 26, 2026

Façade-Level Monitoring of CO2 Variability under Urban Heat Island Conditions using Low-Cost Sensor Data Loggers
Published on: December 12, 2025
Performance of a CO2 impedimetric sensor prototype for air quality monitoring
Gemma García Mandayo1, Jaime Herrán, Irene Castro-Hurtado
1CEIT and Tecnun, University of Navarra, Manuel de Lardizábal 15, 20018 San Sebastian, Spain. ggmandayo@ceit.es
Abstract:
Carbon dioxide detection is a relevant issue in many fields, and this work focuses on the use of a BaTiO(3)-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.
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