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bigben2k · 07-30-2003, 09:40 AM

I found this one:
http://www.surpluscenter.com/item.as...&catname=water

$4.69

+/- 0.2 psi reading scale, over a range of 0 to 30 psi. 2" diameter face. 1/4" NPT connection.

With 0.2 psi graduations, I can read it within 5.5 inches of water column. If I use a magnifying lens, I can get 5 times more accurate (the limit of what we can perceive, reasonably), for +/- ~1 inch.

Edit, for Bill's sake: there is no mention of the accuracy level of this gauge. I can read it all I want, and I can try to get as accurate a reading as I can, but it still doesn't tell me how far off I can be. If it's 5% of full scale, then I may have a margin of error of +/- 1.5 psi.

07-30-2003, 09:40 AM	#193
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	I found this one: http://www.surpluscenter.com/item.as...&catname=water $4.69 +/- 0.2 psi reading scale, over a range of 0 to 30 psi. 2" diameter face. 1/4" NPT connection. With 0.2 psi graduations, I can read it within 5.5 inches of water column. If I use a magnifying lens, I can get 5 times more accurate (the limit of what we can perceive, reasonably), for +/- ~1 inch. Edit, for Bill's sake: there is no mention of the accuracy level of this gauge. I can read it all I want, and I can try to get as accurate a reading as I can, but it still doesn't tell me how far off I can be. If it's 5% of full scale, then I may have a margin of error of +/- 1.5 psi. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101 Last edited by bigben2k; 07-30-2003 at 02:00 PM.