They might give a close idea for room humidity, 40%-70%. They won't be accurate at higher humidity. If humidity could be read with a $12 hygrometer, there would be no need for the very expensive ones. An A/C tech friend of mine uses a sling hrgrometer, he would not use this complicated tool if a $12 one would work.

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• What is a good one! - DillanSimpson, Thu Jul 3 08:47:16 2008
• RE: What is a good one! - atp151415, Thu Jul 3 09:00:44 2008
• RE: What is a good one! - atp151415, Thu Jul 3 09:01:37 2008
• You can't read humidity - mikebell, Thu Jul 3 09:37:51 2008
• Why not?? - dacherrypicker, Thu Jul 3 09:51:54 2008
• RE: Why not?? - mikebell, Thu Jul 3 10:09:03 2008
• RE: Why not?? - j3nnay, Thu Jul 3 12:16:48 2008
• RE: Why not?? - dacherrypicker, Thu Jul 3 12:19:04 2008
• RE: Why not?? - DillanSimpson, Thu Jul 3 13:21:24 2008
• RE: Why not?? - joshhutto, Thu Jul 3 13:43:19 2008
• They aren't needed.. - mikebell, Thu Jul 3 15:55:19 2008