2-Pack Mini Hygrometer Thermometer Meter Digital LCD Indoor Room Monitor

I use these little guys to keep track of the humidity in my 3d printing filament box and they work great. Still haven't ran out of battery after over a year and they are easy to use and crazy cheap. The screen is easy to read, and its pretty small so you can get them to fit just about anywhere. They are durable and I don't think I'll have to replace them anytime soon so you can't go wrong with these bad boys.

I picked up this 2-pack to keep an eye on the temperature and humidity around my 3D printer filament, and they’ve been flawless. The readings are accurate, update quickly, and the display is super easy to read from a distance. Both units matched each other perfectly right out of the box, which is a good sign of consistency. They’re small enough to fit inside filament dry boxes, AMS units, or storage bins without taking up space, and the option to switch between Fahrenheit and Celsius is a nice touch. For anyone who prints a lot and wants to keep filament in ideal conditions, these little monitors are a great, inexpensive upgrade. Highly recommend.

These work fine for my needs. I use them to motnior the humidity in my 3D printer AMS unit and the room where my filament is stored. I am not sure how accuray they are as they are not supplied with a calibration certifcate.

Works good and does well in my ams unit. Dont like that the lowest reading is 10%. Seems accurate for the humidity though. Wish there was a backlight for visibility.

It was a nice surprise to receive the pair of these with batteries already installed and functional & ready to use PLUS two spare batteries for later.

These are so handy to have! I bought 2 brand new incubators and checked the incubators displayed temp and humidity compared to both of these in it at the same time, it can help you set the incubators to the correct temp which may display higher and helps manage the humidity accurately. I did try them both at the same time in each incubator and these show the same temp and humidity as the other one. They are accurate and reliable, small take up hardly any room, I am shocked at how cheap these things are compared to how good they are. You could use them in any situation where you need to monitor temp and humidity.

Small, comes with extra batteries. Nice

I have a wonderful handmade classical guitar. This has helped me to maintain proper humidity levels for my investment.

まず電池が最初から入っててすぐ使えるのはとても助かります。 息を吐きかけたりすると数秒後にはそれに即した値を反映する位の反応の速さです。 大人が手を👌にしたときのサイズを想像してもらえるとだいたい同じくらいの大きさになると思います。 2個パックで十分かなと思ってましたが、これは、程なくまた欲しくなりそうです。

I needed a cheap hygrometer for my 3D Printer's filament unit. These were just what I needed and were the exact size for the dessicant tub I'd printed. These were inexpensive but seem to be accurate enough for my needs. And being a set of 2 I have a spare if I need one!

These are great - I use one to monitor the moisture levels inside and outside my 3D printer housing and they work well. It is particularly noteworthy that when side-by-side (outside the enclosure) they read the same so do give a good differential reference. I can't speak to absolute reference accuracy, but they can't be wildly out as they do seem to align roughly to my home humidistat.

サイズも小さくて設置場所に困らない。値段も手頃です。

Bought this product to check relative humidity in my recording studio where I keep my guitars. Was quite surprised to see the levels were only at 40 so I purchased a small humidifier and humidipacks to place inside my guitar cases. Well worth the buy.