What is the best introduction to measuring natural gas?

The company recommends using a vortex flowmeter or a swirling vortex flowmeter. Why not use a turbine flowmeter? Because the flow rate of the measured gas is relatively large, it is known that the turbine is rotating in the middle of the axle to generate a signal, but the speed of the axle is too fast, the temperature will become high, and the gas may be dangerous. There are also long working wheels that will soon break down.
Therefore, the company recommends using a vortex flowmeter or a swirling vortex flowmeter for gas measurement. Turbine flowmeters measure non-conductive liquids such as oil.
The precession vortex flowmeter is the main recommendation, which is the best used now. Temperature and pressure can be measured simultaneously, and small flows that cannot be measured by vortex can be measured.