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Old 10-28-2012, 09:50 PM
Larry123 Larry123 is offline
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Originally Posted by birkey View Post
Does the amount of vacuum/pressure change what thickness of fluid should be used
Just make a U tall enough to cover the pressure range you expect without blowing the water out. The dia. of the tubing does not matter; use clear Tygon tubing from the hardware store, I like 3/8. Hook up to the pressure you want to measure, just take a tape measure and measure the difference in height between the two columns of water, that will be your pressure (inches of water pressure). 1 inch of water @ 60 deg F = .0361 psi .

You can add some food coloring to dye it if you like.
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