Gas dynamic calibrator

The utility model relates to the technical field of gas calibration instruments, in particular to a dynamic gas calibration instrument, which is characterized in that a mass flow controller is respectively connected with a standard gas generator and a zero gas generator and is used for accurately controlling the flow of zero gas and the flow of standard gas; the gas mixer comprises a standard gas input mechanism, a zero gas input mechanism, a base, a shell, a diversion cone and blades, the base is arranged at the bottom of the shell, the diversion cone is arranged on the upper portion in the shell, the blades are arranged on the outer surface of the diversion cone around the central axis of the diversion cone, and the diversion cone is in transmission connection with a driving mechanism. According to the gas mixer, the rotatable flow guide cone is arranged in the gas mixer, when standard gas flow impacts the flow guide cone, the blades arranged on the surface of the flow guide cone throw the standard gas flow