▎ 摘　　要

NOVELTY - The utility model claims a sensor for detecting the gas composition, wherein, comprising a substrate and a surface of the substrate, a continuous graphene layer, the substrate comprising an electrode layer disposed on the semiconductor material, the electrode layer comprises at least two electrodes separated from each other, the graphene layer covers the electrode layer and because of the isolation of the electrode exposed on the surface of the substrate. to implement a sensor for detecting the gas component of the utility model has the following beneficial effects: the sensitivity is high, the sensing signal processing easier and more accurate detection result.