Capacitive gas flowmeter

The invention relates to the technical field of flow measurement, in particular to a capacitive gas flowmeter which comprises a collecting assembly, a measuring assembly and a circuit control module, the circuit control module is in signal connection with the measuring assembly, and the collecting assembly comprises a main pipe and an inner pipe arranged in the main pipe. The main pipe and the inner pipe are mutually independently arranged, the measuring assembly comprises a testing cavity body, a compensation cavity body and a cover plate assembly covering the testing cavity body, the testing cavity body, the compensation cavity body and the cover plate assembly are not communicated with one another, an air inlet channel of the main pipe is communicated with the testing cavity body, and the inner pipe is communicated with the compensation cavity body; the capacitive gas flowmeter can accurately measure the flow of various gases in flow channels such as circular pipelines and rectangular pipelines, is used fo