JEDEW 2 Pack Hygrometer Thermometer Digital Humidity Meter Indoor/Outdoor Humidity Monitor Reptile Thermo-Hygrometer for Greenhouse Humidors Terrarium Jars, Fahrenheit (℉) /Celsius(℃) (2)

I originally bought these to monitor the humidity in my Bambu AMS units and in my airtight filament storage tubs with desiccant, and they've been fantastic. They're small enough to fit almost anywhere, yet the display is large and easy to read at a glance. The humidity readings have been consistent and make it easy to know when it's time to recharge or replace the desiccant, which helps keep my filament in great condition. They've become an essential part of my 3D printing setup. One unexpected bonus was that each unit came with a spare battery. That was a nice surprise and shows the manufacturer put some thought into the customer experience. If you're into 3D printing or just need a reliable way to monitor temperature and humidity in small spaces, I can definitely recommend these. Great value for the price!

Both went straight into the filament dry boxes next to the desiccant. They read within a couple percent of each other then my dryer, which is all I need to know when to recharge the beads, and the display is legible even in dim light. Two months in, no drift, no dead unit, no falling apart, which is more than the low-star reviews would have you fear. Only nit is the button cell batteries, plan on replacing them yearly. For a filament shelf this is honest value; for a cigar humidor, buy something calibrated and certified.

This is what I use for my cigar tupperdores. Simple, affordable, and accurate. Will continue to buy because they just work.

If you are using these to monitor your filament storage, they are incredibly practical but have a few quirks you should know about. ​ Pros: ​Perfect Form Factor: They are tiny. I was able to place mine directly in the center of the filament spool, which is the best place to measure the micro-climate of your plastic. ​ Decent Accuracy for the Price: While they might not be laboratory-grade, they are consistent. In my testing, both units in the pack stayed within 2-3% of each other. ​ Battery Life: They come with batteries included (LR44), and they last for months because the LCD pull is so low. ​ Cons/Things to Know: ​The "10% Floor": Be aware that many of these budget sensors struggle to read below 10% humidity. If your dry box is extremely well-sealed with fresh desiccant, the screen might just stay at 10% even if it's actually lower. ​Not a "Quick" Read: It takes about 10–20 minutes for the sensor to fully adjust after you close the dry box lid, so don't expect an instant drop in numbers. ​ No Backlight: They can be hard to read if your storage box is in a dark corner of your basement workspace. ​Final Verdict: For less than $15, these are a "must-have" for anyone printing PETG or TPU. They tell you exactly when it's time to recharge your desiccant packs before your filament gets ruined.

It may not be the most expensive/accurate model but it certainly works. It's a low-power (and low-cost) design, so it will not update in real-time. I estimate it checks the reading every 5-10 seconds. So if you just bought it and the two units show different readings, leave them undisturbed for about an hour and check again. I got these because they are panel-mountable. It's about 40mm diameter. I don't have a set of metric hole saws, so I 3D-printed a bracket that I can attach to a bigger hole. The real test for me was when I was applying polyurethane in my basement shop, and the stuff just wasn't drying. I checked this humidistat, which I'd left on a shelf, and it read about 60% RH. Too high for a shop. I kicked on a dehumidifier. The RH went down to about 53% in about 30 minutes and the polyurethane started to cure a lot faster. A really good purchase for DIY projects. If you want something fancier (i.e. backlit display, faster readings, more features) you're gonna pay for it both in power consumption and dollars. For me, this is perfect. Probably going to get a few more to monitor other parts of the house.

I think it's silly that the humidity display is so much larger than the temperature

digital humidity and temperature is displayed by this device. The largest numbers are humidity; temperature is smaller. A somewhat small device so you need to be close to read the display. Case seems designed to fit into some larger item and these are extra parts available for purchase. Item is round and does not sit on a surface except flat on the back with the display facing up. Uncommon battery size, but a spare battery is included. One display was dim and battery needed to be replaced immediately. Item does work but I doubt I will buy any more like this.

I printed the housing for the AMS Pro 2 and these fit it perfectly. they are easy to read and come with batteries in them already with extra batteries included.. they are small enough to be portable and the functionality they provide is awesome.

جيد جدا

These are fine little devices for the price, but when they arrived, one had a completely dead battery and the other had no battery at all. Other than that they're OK for the price.

تعمل الى الآن بعد استخدامها لمدة سنة ونصف تقريبا، لم اتحقق من دقتها بجهاز اخر لكن حسب الحرارة والرطوبة المحسوسة التي احسها جسديا في الغرفة يبدو ان المنتج يقيسها بدقة ويعكس ارتفاع وانخفاض الحرارة والرطوبة بسرعة

Both are amazing fairly accurate. Just 10 times more expensive than Indian version. Size is small portable. Quality is amazing. Easy to use.

Otimo produto bonitinho chegou bem embalado, vem com 2 baterias