Evaluation of Metal Oxides Sensors for the Monitoring of O₃ in Ambient Air at Ppb Level

Abstract

Hereafter we present a laboratory evaluation of commercially available and prototype metal oxide sensors for the monitoring of O3 in ambient air at ppb level. The tests includes the determination of the sensor response time, their calibration function, the evaluations of repeatability, short and long term drifts, the hysteresis effect and the matrix effect. Interferences from gaseous compounds, temperature and humidity parameters are also evaluated.