Mini Hygrometer Thermometer 2PCS Mini Digital Humidity Gauge, AikTryee Hygrometer Indoor Humidity Monitor, Temperature Humidity Gauge Meter for Humidors, Greenhouse, Garden, Cellar, Closet, Etc

Even came with batteries! And more batteries for later. Very nice units.

When placed side by side they give a different reading...close by about 1 degree but being side by side the reading should be the same and it is NOT.

I bought this so time ago and it still works! I can read it perfectly and i believe it gives me a better accuracy than other that i have bought! Will update if anything changes.

Worked and lasted a while

Product exactly as described, came with double sided tape pads, large numbers and easy to read; measurement are consistent between the two within 1 degree and consistent with my side of tank heat indicator strip within about 3 degrees. For the price, this is a reasonable set that will give you a good idea of temp and humidity. May not be exact, but then again... these things rarely are exact. For my purposes, the 1-3 degree difference is not a big deal. Also came with extra batteries which is a huge plus since they are little button batteries and I would have to order more. Now I can change them when they go out and go ahead and order new ones without having to take them out of the tank, see what kind, and then wait several days to get them. Would buy again.

Both worked fine and accurate

After I bought my first solid wood guitar, I started researching guitar care. The most noteworthy thing I found was the importance of making sure your humidity is not too low or too high, which can destroy even the highest end of guitars over time. I had no earthly idea what the humidity was in my house so I purchased these cheap hygrometers. It’s been 6+ months and the battery’s are fine on both, and the two read the exact same number side-by side, so they get the job done. Come to find out my humidity is in the optimum range pretty much year round, but it gave me peace of mind that I wasn’t letting my expensive instrument degrade over time.

TLDR; don’t expect pinpoint accuracy, but it’s reliable for general readings. Good purchase for its price point. I have no need for scientific measurements; I just need to make sure the air is wet enough for my plants without spending an unreasonable amount. If you buy a pack of two, you notice the two will show different readings for both humidity and temp, and there’s not really a way to calibrate these. However, the readings are still within 1 or 2 degrees of each other. And from testing by transitioning from normal room humidity to the inside of my tropical plant enclosure, it’s definitely able to pick up the changes in humidity within a minute or so. Another note: leaving these in 90%+ humidity for a long time (maybe 6hr+?) will cause the display to glitch out and become unreadable. Moving the device back to lower humidity will fix it if you wait a bit. And if not, just remove the batteries and put ‘em back. That usually fixes everything.

Got these for my incubators. They seem pretty accurate. Theyre small, but easy to read.

These read differently from each other when side by side. Do not rely on readings!