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 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 didn't realize how small they were but dang do they work well. They also work super fast and are very accurate. Greate purchase and has a larger print to make it good for a quick reading!

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.

Love these little things. Perfect to have throughout the house. They fit anywhere and are accurate.

These work great and having the humidity helps me state my case. I work in buildings that refuse to turn on the A/C for works and I can use these to hold them accountable to OSHA regulations! They can’t argue with me when I show them to their face the temperatures they are making us work in! No excuse now!

So, I do a little 3D printing and have many filaments. I have tried different methods of keeping my filament dry and, lately, I decided to try having individual dry boxes where they are airtight, and I add some dissecans on them to try and keep the moisture under control. I have tried vacuum sealed bags before or having a big airtight container where I fit several of them, but nothing has been really effective. In any case, I am using these Hygrometers to put them inside the dry boxes to make sure they have low moisture inside. For that purpose, they are good enough. I do have to say they are not very accurate, but you will get a ballpark +-5 degrees since to be the range. Also, they don't match temperatures when on the same room. I actually had them all inside the same dry box. I left them in there overnight and the next day I check them without opening the box and out of 6, 3 had the same reading and the other 3 were off by +-5. If you are looking for accuracy, they are not the best but, if you just need to make sure things are around a certain temp, they are cheap enough that are worth it.

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.

Being somewhat a fanatic when it comes to relative humidity, I own many hygrometers. Hygrometers are notorious for inaccuracy. These come with batteries installed and working. The first thing I noticed was that all six units were reading withing 2 points of each other. The reading are very close to my best hygrometers. I mainly use these in cigar humidors where space is premium.