6 Pack Mini Hygrometer Indoor Humidity Meter, Small Digital Thermometer Humidity Gauge Meter, Indoor Thermometer Hygrometer Monitor Fahrenheit (℉) for Humidor, Thermostat Reptile Tank, Mason Jars

I'm using these for tracking the humidity inside of "dry boxes" for 3d Printing Filament. They appear to be very accurate for this purpose. They aligned perfectly with a more expensive temperature and humidity sensor I use for another room. They do not react quickly, and take a few seconds to respond to (and settle on) a new humidity and temperature when moved from inside a box, say, to outside, but this should be fine for most purposes. The units themselves appear fairly robust - I dropped one of them from about 3-feet onto a concrete floor, and there was no sign of damage or any change in functionality. The only complaint I'd make is that the LCD screen can be a little hard to read from certain angles, but overall, these are perfect for what I bought them for.

All 6 are actually very accurate and consistent with each other when I laid them side-by-side on a table. I was worried that at least 1 may not be calibrated as well, which I expected for the price.I have them all over the house, and it has become an obsession to check the temp and humidity in various areas of the house! Like a closet, bathroom (especially after a shower), bedroom, kitchen (especially after baking), food pantry, laundry, by a window... I am so fascinated by the differences in each location of the house, and now aim to improve air circulation to warmer/more humid areas.I would absolutely purchase this again!Great value!

It’s a good value for the money they work as they should and u get six to a pack

I bought these thermometer-hydrometers for a a few of my reptile enclosures for ambient temp tracking. The displays are nice, and the battery life is pretty good. Size-wise, the product is quite small, but is still big enough to read easily. They function well, but sensitivity-wise, I'm not super sure on how accurate they are. Overall this pack appears to be a great affordable product for keeping track of ambient temperatures, and is a must-have for any reptile owner. One note on them though is that you will want to have Velcro or double-sided tape to adhere them to wherever you want the thermometer-hydrometer to be placed, as they do not come with adhesive.

I got these because PETG printing was becoming problematic as we transitioned into hot, humid weather. When I actually heard tiny “pops” from exploding water inside the filament as the filament moved through the hot end, I knew I had to do something.When I dropped one of these sensors into the zip bag holding the PETG reel, I quickly learned that the air in the bag had a humidity level much higher than the workspace. I also learned that my zip bag collection of used desiccant packets was over 40%. So I put the PETG into the filament dryer at 165 for 2 hours, and the spread-out desiccant packs into the microwave for 10” on a defrost cycle. Now I know that my PETG filament has less than 20% humidity and the desiccant supply is a bit over 10%.How did I get by without these for all these years?

These were okay…humidity is off by a few percent’s which is not helpful for what I needed it for but it’s okay

I’m not sure how accurate these humidity detectors are, but I absolutely love them! They’re super lightweight, easy to use, and perfect for quickly checking around my plants and home. No complicated setup, just straight to the point. For the price, it’s a great little gadget to have around!

Very handy to have around. I bought a dozen. One had problems with one digit on LCD. At under a dollar a piece, they are almost disposable. I made 3d print filament drying box and keep one in it. I also put one in fridge, freezer, RV, bathroom, upstairs, downstairs, garage, outside. Very handy.