7.1.4 Monitoring breath carbon monoxide gas using micro thermoelectric sensor

D. Nagai, T. Nakashima, M. Nishibori, T. Itoh, N. Izu & W. Shin
The CO gas, which is several ppm level in the human breath, is used for medical examination. In this study, CO combustion catalysts of Au, Pt and Pd loaded on CoO on the thermoelectric gas sensor (TGS) were developed and the combustion performance of these catalysts was evaluated. We have demonstrated that the micro-THS detected the CO concentration in air from low as 1 ppm to high as 1 vol%. The noise voltage level of...