Experts, which type of flow meter is best for compressed air and nitrogen in air compression stations?

For adjustable flow meters or orifice plate flow meters, it’s better to use 316L adjustable flow meters as they are more effective

Either works: lol it depends on how much budget you have and what level of precision you need

In general, factory premises use them for internal economic accounting purposes, where the requirement for precision is not very high; cost-effectiveness is the main consideration, so orifice plates or vortex flow meters are used.

Vortex flow meters, thermal gas mass flow meters – there are many others as well. Accuracy calibration is at 1.5%

If internal measurement is to be carried out within one’s own company, it is recommended to use differential pressure flow meters, such as orifice plates and V-cones, as they are stable and reliable

I think it’s better to choose a thermal mass flow meter, as some of the air compressors on site generate resonance interference. If you opt for a vortex flow meter, it depends on luck – in the presence of such interference, the readings from the vortex flow meter will fluctuate erratically. Thermal mass flow meters are less affected by resonance interference (due to their principle of operation)； As for differential pressure flowmeters such as orifice plate flowmeters and V-cone flowmeters, they can be used, but their price is higher compared to thermal gas mass flowmeters ； The above are just some of my experiences, shared here ； I carried out a compression air measurement last year; the customer chose vortex flowmeters for the two pipelines. One of the flowmeters gave decent readings, while the other showed fluctuating flow rates. After spending several days trying to fix the issue, we eventually switched to thermal mass flowmeters to resolve the problem

The swirl vortex flowmeter is the most suitable option, with a low lower limit and built-in temperature and pressure compensation. Several customers who previously used vortex flow meters were unable to measure flow rates at the lower limit. Typically, the diameter of the pressure exhaust pipe is chosen to be large, and with a pressure of 6.7 kilograms, this results in a flow meter that is too small for the given operating conditions.