▎ 摘　　要

NOVELTY - Gas concentration detector comprises a heat insulation layer (1), a display screen (2), an indicator light (3), a control switch board, a heat dissipation port, a gas concentration sensor, a buckle (5), a support shell, a protective shell (4), a heater, a motor, a reaction box and a valve, where the upper surface of one end of the protective shell away from the heat insulation layer is connected with the switch board through screws and nuts, and a cover is connected to one end of the protective shell away from the heat insulation layer, and a waterproof strip is provided at the junction of the cover and protective shell. The waterproof strip and edge of the cover are connected by glue. The surface of the cover is provided with an integrated gas inlet and the heat dissipation port which is located below the gas inlet. The inside of the protective shell is connected with a detection column through a rotating shaft, where the detection column communicates with the gas inlet. USE - Gas concentration detector. ADVANTAGE - The detector is convenient for the staff to do unified treatment, and is harmless to the human body. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a hydrogen refining device; and (2) a graphene battery. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic structural diagram of a gas concentration detector. Heat insulation layer (1) Display screen (2) Indicator light (3) Protective shell (4) Buckle (5)