http://bit.ly/14MjSt3
Rated with half the error of accurites with no batteries INSIDE the enclosure. Cheap enough to buy a few and check them against each other.
http://cigaroasis.asia/Hygrometers/W...ygrometer.aspx
Look for a METAL face card and calibration screw. They are accurate and stand up to dust and dirt that digital ones do not. They also can be calibrated.
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