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

I bought the two pack and they are cheap hygrometers but good value. They are not 100% accurate as both are in same humidor and have different readings. About a 2-4% difference.

I bought these for my small cigar travel humidor and so far they seem to be very accurate. I put both in my humidor case, along with two 69% RH size 8 boveda packs and this is what they’re reading after a few hours (sorry for dark lighting, outside enjoying a fresh cigar). They also came with extra batteries and adhesive strips which Was a great bonus that I did not expect!! Very satisfied so far, but will have to see how they hold up as time goes on.

Both broke on day one. The little plastic piece that keeps the back on and the batteries in broke almost instantly.

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.

I ordered these to check the humidity in a cheap dehydrator I use to dry 3D printer filament, and at first was disappointed because they showed different temperatures, but since they showed the same humidity reading, I decided to go ahead and give them a shot. After about a day, they both read the same temperature, and are within one or two degrees and a couple of percent humidity of what our household thermometerhygrometer reads, so Im satisfied that they function fairly well. For those who are complaining about the inaccuracy, Id recommend giving them a day or two to acclimate. I have no idea why they would read differently upon arrival and then slowly adjust to the correct temphumidity, but thats what happened with mine. Keep in mind that these are very cheap, so wont be as accurate as an expensive hygrometer. If youre trying to protect your expensive cigars, or keep your bearded dragon comfortable, DONT BUY A CHEAP HYGROMETER! If you just need something to show that the dehydrator you bought at a thrift store is actually working, these work just fine. The fact that mine included 4 extra batteries is an added bonus.

I ordered these digital Hygrometers thinking they would be somewhat accurate within a percentage point or so. I decided to do the salt test to see if they would read at 75%. As you can see from the photo after 24 hours the salt test proved that these are both inaccurate. One read 73% (not too bad) the other read 70% (way off). You do get what you pay for. I was hoping to be able to re calibrate them after I found out what the actual humidity level it was reading but according to the company all you do is take out the batteries and put them back in again! I did do this before I administered the test. Please be aware that you should do a salt test to see how far these are off. I wouldnt necessarily recommend these since in some cases knowing the humidity within 1% can be extremely important for some people. You should be able to calibrate them as well.

This 2-pack of combo hygrometer (measures humidity) + thermometer are small, light, and seem to work well (placing them near each other and a 3rd model of a different brand, the readings are not identical but are fairly close, within about 0.5 degrees in temp and 1–2% humidity. They are also a great value, and come with batteries pre-installed (requires 2 each) PLUS comes with 4 spare batteries (one set for each unit). The only downside is the mounting. They DO come with small pieces of double-sided 3M tape (another nice touch), BUT using it to mount them would (a) block the battery compartment on the back and (b) may leave sticky residue on your glass surface. It would be great if they had with a small loop so they could be hung or a small hole to use a suction cup. But if youre OK with that quibble and dont need perfect accuracy, they are a great value and do the job.

Helped keep humidity levels in my incubator on track. Never once had any issues

2 units and extra batteries came in the box. Work well, does what its supposed to do.

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.