Caliber III Thermometer Hygrometer Review

Average Reviews:

(More customer reviews)I bought this hygrometer after a lot of research. I use it to monitor the humidity level in my acoustic guitar cases. The hygrometer is compact (fits nicely in guitar cases), is easy to read, and has the nice feature of a record of highs and lows. It is very responsive, in fact I bought two (two guitars!) and tested them side by side, and they basically changed simultaneously. If you pick it up, within seconds the recorded humidity level changes just from the moisture of your hand! It has the industry reputation for being the most accurate hygrometer, and my experience bears that reputation out. I highly recommend this hygrometer for acoustic guitar owners, though for whatever reason it is typically just listed for cigar humidors - guitar makers, dealers, and players should all take notice.

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This Western digital humidor gauge accurately measures and displays relative humidity and temperature to assure your cigars are stored in the ideal conditions keeping them in prime smoking condition. The Caliber III never requires calibration; there are no springs to stretch or moving parts to wear out. Features easy to read large display, slim profile design, and magnetic mount. Accuracy +/- 1% humidity, +/-1 degree temperature. Full 5 years guarantee. Dimensions: 3.5" x 1.25" x .25".

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HygroSet II Adjustable Round Digital Hygrometer Review

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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Never 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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