Abstract
Abstract The aim of this work is to design and test an array of metal oxide gas sensors for reliable and reproducible gas detection. Thermally modulated responses of non-specific, resistive-type metal oxide sensors to various hydrogen concentrations and humidity levels are studied. Temperature of each sensor is controlled and sinusoidal temperature profile is imposed over the temperature range of 200 – 500 °C. The dynamic responses upon hydrogen exposure (0 – 3000 ppm) are recorded and studied. The time of one temperature modulation cycle varies from 5 – 10 minutes.
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