4-pack Mini Hygrometer Thermometer Fahrenheit Indoor Room Round Humidity Temperature Gauge for 3D Printer Home Jars Reptile Incubator Guitar Case

Like most people, as soon as I opened the box I put all 4 side by side, and sure enough the readings were very close. I took one of these out on our morning walk today and was very impressed by the speed of response on the humidity readout. As we walked up a hill the humidity went up from 72% to about 82%, which made sense as it was a bit Misty. When we walked into a building it immediately dropped to 65%, and it dropped to 45% when we put the a/c on in the car. The temperature display seems a bit slower to respond, but I was very impressed. These are nice and small to stick to the wall in different rooms, but the readout is easy to see. A good deal.

I am a professional musician in a house full of musical instruments. This 4 pack was perfect for monitoring the humidity in all the rooms where violins/violas/cellos live. You can even put one in the case. They seem accurate enough for every day use and were inexpensive.

Out of 8 I had one be bad out of the package. The others work great. Good price. They work well on filament boxes.

I must have 25 of these. I use them inside plastic cereal boxes to monitor moisture inside where I store 3d printing filament. I have a whole wall of cereal containers that each contain a spool of various colors.

Love these. So small, battery included. Inconspicuous. Accurate. I have one in the bedroom - because the thermostat is in the hallway, who cares what the temperature is there? One in my car, because its an older model without an inside temperature. One on the boat. And, heck, one in my backpack just because….

These are cheap, and the temperature readings seem reasonably accurate. I think the humidity readings are okay for moderate to high values. But they're very inaccurate on the low end. None of the ones I've bought will read below 17% even if they're in a sealed, dry container full of silica desiccant beads. Physically, they're not super sturdy, but they're good enough. None of mine have fallen completely apart, but I've had a few whose cases started to come apart when I've pressed them into a 1 5/8" hole. I was able to press them back together just fine, and the clips have held them into the holes so far. Even with those problems, I'll continue to buy more to use in my 3d printer filament dry boxes. I just have to remember that a reading of 17-18% means "really dry", which is good enough for my purposes. I don't need the extra accuracy I'd get from a more expensive hygrometer.

It was super helpful for our house as I felt like there was too much humidity in the house and it did in fact prove that we had humidity leaking in from outside making surfaces in the house sticky. It allowed us to solve the problem in our house.

All of the hygrometers in this general price range tend to use the same internal sensor - they have a 'floor' of 10% and won't read any lower, and occasionally get 'stuck' in their reading - which can be addressed usually by breathing on the sensor. Meanwhile, they fit perfectly into the 'fast print spool dessicant holder' from printables, which I literally have dozens of for my vac-sealed filament storage. I do wish you could buy them in larger quantities like 8 or 10 packs, but for ~$3 each, they're pretty decent.

Werden klassisch in einem AMS Hydrosystem genutzt. Funktionieren tadellos!

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Not worth buying… straight out of the box only 3 worked and using those 3, I now have 3 different temperature readings and three different humidity readings…

Ottimo per umidor

Ce lot de 4 petit thermometres hygrometres est top. Leurs format compacts permet de les placer absolument partout dans la maison ( cuisine, chambre, salle de bain ou meme dans une serre...) L ecran numerique est bien lisible malgres sa petite taille. L affichage montrant la temperature ou le taux d humidite est ideal poir verifier la confort de l air en 1 couo d oeil. Pour le prix en avoir 4 est chouette pour surveiller plusieurs pieces . J ainmis 4 sur 5 car j ai vu 1 ou 2 fois une legere difference de temperature sur 2 appareils pourtant dans la meme piece au meme endroit. Pile fournie.