Research of Methane Measuring Technique with Full Range by Catalytic Combustion

To solve the impact of high concentrations and the two-value problem caused by catalytic combustion gas sensor detecting high concentrations of methane, The paper has analyzed the theories and studied the measurement methods of catalysis combustion gas sensor in thermal conductivity and catalytic combustion mode, proposed the research method of methane measuring technique with full range by catalytic combustion, and verified the theory through measuring experiments. Experimental results show that the method is and feasible, reduces the preheating conversation process when switching the two sensitive modes, and solves the problem that errors jump largely when switching between two modes, and achieves full range methane measurement with only a single catalytic combustion sensor. It has an important significance for industrial and mining safety production.