u-tube manometer

Discussion on general flowbench design
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hubba
Posts: 20
Joined: Thu Dec 19, 2013 10:34 pm

u-tube manometer

Post by hubba »

I have been reading and have mixed feeling about it. when building one do you mark the inch marks as 1 or 2 inches. I have seen it done both ways on peoples homemade ones. just want to know what is correct.
86rocco
Posts: 292
Joined: Thu Mar 04, 2010 9:01 pm

Re: u-tube manometer

Post by 86rocco »

For every inch the fluid rises on one leg of the u-tube, it goes down the same amount on the opposite leg so if you're measuring on one leg only as is customary, marks one inch apart correspond to two inches of pressure difference.
hubba
Posts: 20
Joined: Thu Dec 19, 2013 10:34 pm

Re: u-tube manometer

Post by hubba »

ok thanks. so if you built one with one tube and a reservoir it would actual inches as marked?
1960FL
Posts: 1338
Joined: Fri Jan 08, 2010 10:36 pm
Location: Maryland

Re: u-tube manometer

Post by 1960FL »

Yes that is correct as long as you understand the whole well drop thing and the need to minimize it by having a very large differential area ratio.

Rick
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