In order to detect the concentration of gas in the methane gas

on the basis of the methane biosensor

using the catalytic properties of methane monooxygenase in oxygen

immobilized enzyme membrane is made together with microbial methane oxidation of the fixed layer mounted on oxygen electrode to make catalyst performance on the sensor better.Working principle

composition and fixed method of this enzyme-microbial sensor are analyzed.It is proved by experiments the sensor respond rapidly and its stability

reproducibility and precision have also been increased compared with the traditional biological sensors.