LWQ gas turbine flowmeter is a kind of speed type flowmeter that can accurately measure gas flow. It has the advantages of high measuring accuracy, large measuring range, simple and lightweight structure, good repeatability, and convenient installation and maintenance. It is mainly used in chemical, petroleum, metallurgy, aviation, scientific research, and other fields, which can be used in natural gas, city gas, nitrogen, air, propane, butane, and other gas measurement. The instrument has high precision and good repeatability and is suitable for trade measurement and industrial process testing. When the gas turbine flowmeter is measured online, the density of the medium changes with the change in temperature and pressure. To make accurate measurements, the temperature and pressure of the detection medium must be tracked at the same time, and the volume flow under different working conditions must be converted into the volume flow under the standard state or the agreed state.