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Posted by HeatPro on December 21, 2007 at 09:17:47:
In Reply to: PRESSURE GAUGE posted by pete on December 21, 2007 at 06:17:10:
: Hi Heatpro, Can I just use a inch pound pressure gauge to use to check incoming gas pressure? I see they sell these manometers that measure water column, and are expensive. Long as I know what the water column converts to in pressure can't I use a inch pound pressure gauge? A lot less money.
If pros could 'get away' with a cheap meter they would. A pound is shown on a gauge when water stands 27.71 inches above it. You won't be able to see where 4 inches of water column are on a pound gauge.
http://www.wisc-online.com/objects/index_tj.asp?objID=ELE506
If you understand the principles, then someone can make a cheap water column u-tube gauge out of plastic tubing and a little color in the water.
http://www.dwyer-inst.com/htdocs/pressure/ManometerIntroduction.cfm