Identification of H2S impurity in hydrogen using temperature modulated metal oxide resistive sensors with a novel signal processing technique

We report here on the results of a study on the response of copper oxide (p-type and mixed) based, low-power microelectromechanical (MEMS) gas sensors to parts per million (ppm) levels of hydrogen sulfide in a hydrogen atmosphere. It is shown that a thermally modulated metal oxide gas sensor can be used for the identification of the H2S impurity in a reducing environment without the need for a ref...