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Mass flow meter, compressed air
- Thread starter harleyflh
- Start date
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.
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.
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
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
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!
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!
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
Industrial
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
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
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