MOS sensors array for methane monitoring with UAS

The purpose of this work is to evaluate the potential of metal oxide gas sensors array for methane measurement with an UAS. Methane samples, prepared in laboratory as well as collected on site, were measured by a lab-made device consisting of six-gas sensors. Results showed for some sensors a good sensitivity even with low methane concentration (3-80 ppmv). However, PCA revealed that the presence or absence of methane in field samples is not clearly identifiable. A strong separation between field samples data and lab-made sample data was also observed. This suggests us to be careful when applying a model calibrated in a laboratory for field prediction.