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.

I need to monitor the humidity is a number of jars. This six-pack was perfect. The unit is simple. They come with batteries. There's no on/off switch. They are ON all the time. They are accurate as far as I can tell. All six units respond to temperature and humidity precisely. The small, compact design makes them easy to work with as well.

They had different accuracy reading in the packaging, but all were about the same. Worked well, nice and compact, but if they get water on them they will read very moist for hours. They feel durable good for the price though.

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.

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.

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!

I put 1 in each fridge and keep 1 in my bedroom. I cure meat, temp is very important. I need to be constantly aware and on the lookout for my fridge glitching. 36-38 is optimal for me. If I wasn't curing meat I wouldn't care if it was 39-41 One in the bedroom helps me keep it at 70, about the warmest I like to sleep. These are quite accurate. Batteries have lasted about 4 months so far.