I have learned on the plumbing forum how to make a low cost water column tester. This tester is used to test for leaks in gas lines with a very low pressure, (about Ĺ PSI). I was wondering if there is a low cost device that would measure in Pascals? I was going to use my home made water column tester, but after learning that 50 pascals equal about 0.20 inches of a water column, I donít think that the water column tester will be sensitive enough for what Iím going to use it for.
PS. I'm going to be doing a blower door type of a test on my buddy's house to look for A/C duct leaks in his attic. I'll be pressuring his house and using a smoke bomb to try and find any leaks.