Title: Definitely does NOT work right out of the box
Review: Unfortunately, this hygrometer requires on site calibration to work properly. I put it into a water saturated environment and it read 80% humidity. Coming back to this site, I realize I should have bought the calibration kit that the manufacturer offers. The shipping charge makes the whole endeavor a wash. I'll probably throw the thing away. Bottom line, if you buy this product, get the calibration kit at the same time. Hopefully that will make it worthwhile.
Is this product review negative?