Michael.N. Posted August 2, 2015 Report Share Posted August 2, 2015 Works on a principle similar to the bi metallic strip, except this works on the different rates of moisture absorption/release of different woods, both long grain and end grain. I used epoxy to glue the indicator together, largely because water based glues have a strong effect on how straight the indicator is when it comes out from the clamps. I glue up at 50% RH, so the 6 'O' clock position is therefore 50% RH. I've had this in the workshop for around 5 years and it still tracks my digital hygrometer pretty well, just at a slower pace. I sent one to Minnesota and he sent me a picture of it in action. They must be experiencing fairly high humidity because the indicator had swung a marker and a half to the right. Quote Link to comment Share on other sites More sharing options...
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