Device for detecting gas concentration

The utility model discloses equipment for detecting gas concentration. The equipment comprises a signal generation unit, a data acquisition unit and a data processing unit, the signal generation unit comprises a light source, a light source driving circuit and a first processor, and the first processor is connected with the light source driving circuit; the data acquisition unit comprises a gas absorption cavity, a signal receiving circuit, a signal processing circuit and a second processor, and the signal processing circuit is connected with the second processor; the data processing unit comprises a data processing circuit and a data output circuit; the signal generation unit and the signal receiving circuit are respectively arranged at two ends of the gas absorption cavity; at least two vent holes are formed in the side wall of the gas absorption cavity. Holes are formed in the side wall of the cavity, so that gas convection is formed, the gas replacement time is shortened, and the response time of signal a