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Old 05-20-2013, 11:12 PM   #8
Weelok
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Join Date: Jul 2011
First Name: Dave
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Default Re: Calibration of a Hygrometer...would this work

Salt test for the win! Get a plastic bottle cap, fill with salt and dampen with distilled water until it is a salty putty in the cap. Put in a zip lock bag at 70 deg F and you get 75% humidity after 8 hours. Cheap and easy; that's what she said.
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