Dear all,

I would like to discuss on following points/questions.

1. which flow meter is best to measure air flow in big rectangular ducts of size 12mX9m? and why?

2. I have considered pitot tubes and annubars, but is it possible to use them in rectangular ducts?

3. can standard DP measurement techniques be applied? and if so, what are the possible problems?

4. any other options like anemometers/Electro-magnetic meters or vortex?

 

pitot arrays are commonly used where you need accurate sustained measurement. single point measurements are practically useless unless you have a confirmed flow pattern or use traversing measurements.