Average Reviews:
(More customer reviews)Bought three (one for each room) + the calibration kit. Calibrated one, and then matched the other two to it. All were within 2% when they arrived, one needed no changes.
Adjusting them is hard, needed some trial and error. I used another meter as a control while I adjusted the first one.
They are very sensitive, touching them briefly will cause the temp and humidity readings to change, so I had to make a change, let it settle for a few minutes, and try again. It sure was cool seeing all three meters read exactly the same when I was done.
These meters are small, about 1.5" across. Mine had stick-on magnets, and the magnet came unstuck after a few months. Pressing it back on has worked so far.
I tried several other (more expensive) consumer humidity meters under $50, and none even came close to the accuracy of these. Some claimed adjustability but they wouldn't adjust at all. My previous one read low by about 6%, and some I tried were off by up to 10%. After that experience I will never use an uncalibrated humidity meter again.
I was worried I would have to buy one of those $100+ laboratory models to get an accurate reading, these guys came to my rescue.
Now my guitars are safe, my shower no longer has mold, and I don't let it get too dry which promotes various infections (sinus and throat). I like around 55-60% relative, and slightly higher when I sleep.
Update: almost a year later, the stick-ons won't stick back on anymore.
The cool part is all three of them still give identical readings, no recalibration seems to be needed, and the batteries haven't run out yet either.
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HygroSet II Adjustable Round Digital HygrometerNever wonder if your digital hygrometer is accurate. This is the first digital hygrometer of its kind capable of being adjusted after calibration.
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