Mini Hygrometer Thermometer Digital Indoor Humidity Gauge Monitor with Temperature Meter Sensor Fahrenheit (℉)

I've had these for over a solid two years the battery has never died its easy to use, it's small so it'll fit in most reptile spaces and it's pretty cheap and works great! The accuracy can be off occasionally but only by 1-5 points so it's not horribly inaccurate and gives me an idea at what he's resting at.

Easy to read thru incubator. Works well am very happy with it and batteries last quite a long time. Years!!

I love the small size and portability of these units, as these will be added to Instrument cases to monitor the humidity in the case. The temperature was initially way off and the humidity was different. The first photo (for some reason Amazon does not display the photos on the order uploaded, so to clarify: temp in 60s with humidity quite different) was taken immediately after I opened the package. I was not concerned as I knew to give the units time. The second photo (1% difference in humidity) was taken after the units had settled a bit more. The third photo showed the units settled (humidity and temp more consistent). The one display did turn off, but I just made sure the battery door was properly seated.

Very nice item. Quick shipping.

Very accurate used in incubation of Chicken eggs

Small and compact digital display with RH and temp. For the value, I think it is pretty good, but the RH accuracy is not reliable. Temp, on the other hand, seems to be relatively accurate.I used 75% Boveda pack that I previously used for calibrating my other hygrometers to measure the error tolerance. After 24 hours later in a ziplock bag, of three devices I purchased, two show +2% higher and one show -1%. I know these cheaper hygrometers tend to have a wider range of tolerance for error, so I am not surprised. There was no calibration instruction so I assume these cannot be calibrated. Also the item arrived with batteries installed, but the units were “on” when I opened the box, so I guess depending when the units were manufactured, I may have a few weeks or a few years before I need to change out the battery. Not sue what these 5 star reviews were based but this unit certainly is not a five star product.

I am very happy with this product so far as it is helping me keep track of the humidity in my incubator, we have lost several chick's due to fluctuating humidity and now hopefully that is not the case! The product is very easy to use, came with batteries installed as well as backup batteries, small and light weight it fits perfectly in incubator

Small and accurate enough I've bought a number of these humidity/temperature monitors to ensure my stash of 3D printer filaments are dry enough to use without stringing or other defects. I'm relatively new to 3D printing and had a good time till recently of printing out items without a problem. However with the cold rainy season starting I've noticed a lot of defects and print failures. I traced this down to the filaments adsorbing too much water. Putting a humidity monitor in each opened package tells me if I have to dry out the filament. With the high cost of some of the filaments and possibility of failures these monitors can pay for themselves again and again.