Investigation of a new catalytic combustion-type CH4 gas sensor with low power consumption

The sensitive composite material was prepared by doping Pd and some metal oxides such as MgO into SnO2–In2O3–TiO2 matrix material. The technique for fabricating the direct-heating-type sensor and a surface-modifying process were employed to prepare the CH4 gas sensor. Its sensitive properties and working mechanism are presented.