Expert’s answer: Vortex flow meter for natural gas
You can definitely use a vortex flow meter for natural gas, but it won’t provide the best accuracy, given your process information. You’ll need a pressure flow meter for this flow measurement.
If you want the best accuracy and you have a little room in your budget, you should consider a Coriolis flow meter. You’ll get better accuracy than with a vortex and you won’t need a pressure transmitter. It’ll probably cost more than other options, though!
You can scale out your flow meter using the Applicator from Endress+Hauser or the Toolkit from Emerson. These tools will help you find the best device for your application.
For more on flow meters you can check out these links:
You can read more about vortex:
Is a vortex a good solution for measuring your air flow? And, what limitations does it have?
Vortex flow meters in low flow profile
What applications suit vortex meters best?
Compressed air flow measurement on Rosemount 8800D
What to do if you have a problem with compressed air flow measurement with the Rosemount 8800D vortex flow meter?
Non-intrusive flow meter
So, what non-intrusive flow meters are there?