> I found this humidistat that I would use for a wood conditioning box > that seems to be fairly good but expensive ($290). Anyone have any > experience with it or can you suggest one that works as well for less > $$$. It’s the RHC that I’m looking at—scroll down to the second unit. > > http://www.greenair.com/humidistat.htm > > David Love If you're conditioning wood for soundboard building, +-5%RH is pretty miserable accuracy. If you set it at 30%RH and 90°F looking for 6%MC, you could get anywhere from 5.2%-6.7%. Of course, if that's just calibration accuracy, and repeatability within a narrow range is good (which they never seem to think is important enough to mention) you can offset the reading and be pretty close. I assume that's what the mentioned 5% "set differential" is for. So even a cheap humidistat can work well if it makes the same mistake with dependable repeatability. Ron N
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