What's the method for measuring pressure drop?

red_dragon · 07-29-2005, 02:36 PM

How can I measure pressure drop in my loop? Thx!

red_dragon · 07-30-2005, 01:53 AM

no one? Some one's gotta know...

BRiT · 07-30-2005, 08:18 AM

First, you need very expensive equipment. Search for a post by Maxxx where he shows off his new equipment and gives some pressure readings for various blocks. This was within the last three months in this forum.

MrBean · 07-30-2005, 08:45 AM

Why would you want to measure pressure drop? You could use a manometer to do that. There are pressure transducers, best would probable be lvdt type.....You can get these, calibrated for 1-5V, or 4-20mA outputs, and you can scale that to a DVM.

Why not use a small venturi in your setup, the upstream side will have a larger pressure, caused by the restriction, on the downstream side you will have a slightly lower pressure, and the change in this would be proportional to your flow....

Record your pressure differential......for a more free-flowing system, dP will increase, and vice-versa.

What do you really want to acheive? Maybe I can give better ideas then.

BRiT · 07-30-2005, 08:54 AM

Found the thread I was thinking of, it's Differential Pressure Meter Testing.

MaxxxRacer · 07-30-2005, 07:12 PM

mr. bean, what are of expertise do you have? you seem to know your stuff when it comes to this.

Brit has the thread I posted a while ago linked above, but that unit isnt for sale anymore afaik.

Fluke and Omega both make a wide range of manometers that will do the job though. some pretty nifty units i found at www.omega.com . expensive though