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.

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.

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.

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….

Seems to work just fine, price is right. Display can only be read straight on. You cannot read it from an angle.

Quick accurate instrument for use in my 3D Printer. I put them in each Filament Spool Center with Desiccant to monitor the moisture levels.

These thermometers & hygrometers work well enough for most uses, realizing that they will only go down to 10% humidity. For drying 3D printer filament, this is good enough. If you set the four units down on a surface and come back in an hour or two, the temperature readings may very by a degree or two. Again, good enough for most uses. But if you are expecting precision instruments, these are not them. Good value for the money.

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

Received today in Ontario - winter time. Came with fresh batteries and all indicated the same as I brought them in the house from the mailbox - outside temperature and humidity. In less than an hour they indicated the temperature and humidity as my central unit thermostat. Great product, all 4 indicate the same: humidity is 40% on 2 pills and 41% on the other 2. Temperature on the 4 pills indicates between 22.2-22.7 Celsius. Fast shipping, quick answers from the seller. THANK YOU Seller! It solves my problem of knowing the humidity in different rooms in the house.