Product review (1 stars): I didn't expect scientific-instrument precision from an inexpensive hygrometer like this. But this one was so far off ...
I didn't expect scientific-instrument precision from an inexpensive hygrometer like this. But this one was so far off as to be useless. I have 3 other hygrometers, and bought this for the dewpoint reading (which it estimates from temperature and % humidity). At a point when my other meters were all reading near 60% (71 deg F temperature), this one was showing 72% humidity.

I returned it as defective.