Mini Hygrometer Indoor Humidity Meter Hygrometer Thermometers 6 Pack Humidity Meters Gauge Hygrometer Mini Digital Thermometer Hygrometer with Fahrenheit (℉) for Humidors, Greenhouse, Garden, Cellar

These hygrometers are amazing. Very useful for precise humidity and temperatures during and after sowing. I put them directly under the dome..works great.

These mini hygrometers are a great value. I picked up a six-pack and tested them side by side in the same room—impressively, all six gave identical humidity and temperature readings, which gave me confidence in their accuracy. They're compact and super lightweight, so I’ve placed them throughout the house, near windows, even in the attic next to a humidifier setup and it does confirm the dehumidifiers reading. The screen is easy to read at a glance, and there’s no complicated setup or batteries to worry about replacing constantly. If you want a simple, effective, and low-cost way to monitor indoor humidity in multiple spots, this little pack is a solid option. No complaints at all!

These are great little hygrometers. They aren't perfectly accurate but they're very close and usually have a margin of error around plus or minus 2%. I used them around the house when we were having issues with high humidity to pinpoint the most humid areas and manage it with a dehumidifier. I also used them in a small enclosed hydroponic set up I use to grow jalapenos. They're small and light which makes them really easy to hang on a wall or make a small cut out in plastic for. I learned that you shouldn't block the back of these as well as that is where the sensor reads the humidity from. There is a small array of holes on the back that you have to make sure have proper ventilation to get an accurate reading. The display is really easy to read and they function on one battery for ages. I haven't had to replace the battery in any of them and they've been going for about 5 months. Overall I would recommend these for the price and quantity and I'll probably get them again.

Works well. The batteries still haven't died and ive been using them all for several months. The humidity reader seems to be accurate.

Like many others here, I'm not using these for gardening or preserving historic paintings in a controlled environment - no, no.. I'm using these to monitor the humidity levels around 3D printing filament. As simple and as silly as it may sound, raw filament does absorb moisture and will cause expansion and popping of the absorbed moisture when it is fed thru a several hundred degree heated print nozzle, leaving bad marks on the prints and unmelted plastic in the nozzle... So, to combat this, we use hygrometers, to monitor moisture content.. The devices that I received were all powered on and reading well. There was 1 or 2 that were out of sync with the rest of the group by a percent or two, so it's not extreme precision, but the work wonderfully enough to get a good read on what is happening in the environment. I say these get a passing grade from me. I appreciate their simple build, good looks, and efficient reads.

These work well for what ya pay for them. I've ordered 2 six packs and 11 of them work fine. One showed up DOA, I swapped out the batteries from one that was working and it still not working, but for the price ya pay for them I'm not to worried about it. They're not super accurate but accurate enough to use in my filament containers.

Great price. These let me track the percent humidity throughout my home to make sure it stays under 60% (the threshold for mold growth). These sensors are really great for getting the information you need for controlling home air quality. If you’re prone to respiratory illness, have asthma, live in a humid climate, or a home with questionable ventilation, buy these. I know these are mainly used for reptiles, but I found them extremely helpful for my own health as well as that of my pet. Apparently our home regularly stays at over 80% humidity throughout, swaying between the low 70s and high 90s % humidity. It means the air is permanently heavy and everything is slightly sticky. Humans generally should aim for the 40-50% range. For asthma, humidity between 30-40% is recommended. This sensor pack let us find out how our behaviors from shower temperature to closed/open windows affects the moisture in the home so we can aim for a healthier balance. It’s the most important tool for staying on top of mold/spores and bacteria in the air. Landed up purchasing a dehumidifier and these sensors are very accurate and in tune with the changes, even if they take a minute or two to adjust. I wish they had a small place for a hook or screw so I could hang them instead of having to find places to stand them up, but so far no complaints.

We moved recently and I found these in a damp box. They still worked perfectly! Best value for a very reliable product.