Mass flow meter, compressed air

[harleyflh]

is there an inexpensive thermal mass flow meter out there that has a range exceeding 2000 scfm.? I need one for 1 1/2" steel pipe. CDI Meters makes a nice inexpensive unit but it's flow range is only 2-200 scfm.

 

[khan101]

Try ifmefector.com. I know they have inexpensive thermal flowmeters which I used to measure up to 1500 ft/m. If you enquire they might have something for your application.

Thanks,

 

[quark]

What pressure we are talking about here? I have used ifm calorimetric sensors in the past but their accuracy is low.

 

[JimCasey]

Why do you want a thermal unit for such a large pipe? Thermal units invariably use a restrictor and the thermal measurement is on a bypass line, so your flowrate is inferred, not directly measured.

A vortex meter would probably be more accurate (1%), less expensive, cause less pressure drop, have wide rangeability, and still inherently linear in this application.

 

[CMfgE1]

I agree a vortex is a good bet. Theres also a coriolis as well. But you never specified the media your measuring.

So go with the vortex and you cant go wrong. Rosemount is excellent but there are less expensive alternatives.
Let us know if oyu need more info



Good luck

Quote: "Its not what you know, its who you know" - anybody trying to find a decent job

 

[ScottyUK]

CMfgE1,

The title of the thread indicates that the fluid is compressed air, although at unknown pressure and temperature. Coriolis is out of the frame from the 'inexpensive' requirement. They are many things, but cheap is not one of them! Vortex is likely to be as good a choice as any.

Rather than deciding what instrument you want to use, why not approach, say, Foxboro and Fisher-Rosemount and tell them what you want to measure, what your budget is, and what accuracy you need then let them spec the best instrument for the application? It sounds like you've already decided on the solution and are trying to find a way of implementing it, instead of deciding what performance you need from the instrument then finding an instrument to meet that requirement.



----------------------------------

If we learn from our mistakes,
I'm getting a great education!

 

[quark]

I would choose the meter first. As far as I know Fischer Rosemount doesn't make density compensated shedder bars. They opt for orifices and I always avoid them in gas applications. Further, I will never declare my budget limitations initially(this is my personal opinion only)

 

[JoeHalliday]

My Multiparameter Mass Vortex will reach 1700 SCFM @ 100 PSI & 70 Deg F. It will reach 2500 SCFM at 150 PSI & 70F.

What are your temp and pressure specs?
To measure 2000 SCFM in our thermal mass meters, you need a 3 or 4" line size

jhallida@twcny.rr.com

http://www.sierrainstruments.com