Semiconductor gas sensors of methane and propane concentrations based on polycrystalline films SmS

The article presents experimental data on the detection of propane and methane microimpurities in atmospheric air, obtained with the help of semiconductor gas sensors located in explosion-proof housings. Thin films of samarium monosulfide, made using sol-gel technology, were used as the working materials of the sensors. The possibility of measuring propane and methane concentrations using a single sensor by changing its operating temperature is shown.