water coloum vs water gauge

Ken_40

They talk funny.

I would assume exactly what you already suspect. Any way to hook 'em together or on a cosistant pressure; one's own mouth being a great source of w.c. range "tests"

There' a gage glass (yes it is spelled gage not gauge) on very old equipment, water columns abounded.

Hope that helps.

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jay_27

water coloum vs water gauge

Is there a differance between water coloum and water gauge? I have a Yellow Jacket manometer water coloum test kit for gas and needed to read negitive inches of water coloum today so I bought a digital UEI manometer that reads inches of water gauge. One would think this is the same but I'm not sure. Thanks

Ron Gillen

Gauge Pressure

Went to their website and their meters measure in inches of w.c. gauge which would be the same as your water manometer. When they make any gauge they allow for atmospheric pressure. If they didn't when you took a gauge out of the box it would read 14.7 psi (at sea level), so they allow for that and call it gauge pressure. Absolute pressure is gauge pressure plus atmospheric pressure. Your water manometer works with a single pressure applied against atmospheric. You can also use your manometer to measure Vacuum unless you are going to exceed it's scale. Check out Dwyer's site here.http://www.dwyer-inst.com/htdocs/pressure/ManometerIntroduction.cfm

Empire_2

Ron's got it

I to have the UEI and it will measure your neg pressure which in this case is called inches of mercury. That instrument also measures DIff. pressures which I think is nice.

My .02

Mike T.

scrook_2

inch mercury vs inch water

Note though that 1 inch of mercury (inHg) = 13.6 inch of water (inH20) (actually 13.595)

also, for those doing gas work 1 psi = 28 inch of water (actually 27.680)

Empire_2

scrook

While I don't disagree with your comments, the (ingh) is a neg valule. I guess that's all I was trying to convey. On a "U tube" you would be able to see the off-set on the guage as reading your specified value..... No diss. intended..:-)

Mike T.

Mitch_5

I have a UEI digital manometer and a U

tube (not the on line one) filled with the red stuff.

Like the tube / don't trust the digital. On occasion will use the digital for a quick check or have one on each side of a gas valve if I am watching things closely.

Column of water don't lie.

Mitch S.

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bob_46

Some gages read

inches of HG (mercury) pressure and some read inches of HG vacuum. It just depends which end of the column you measure from.

ddlong1286@yahoo.com

As a propane service man once told me,"unless you have documentaion on your gauges that they have been tested as to accurancy, the gauge will not stand up in court."

As stated above," the water doesn't lie". I like to have both and test the digital occasionally to confirm it's accurancy.

Don in Mo

scrook_2

Mike

None taken!