LinkDm 4 Pack White Mini Digital Electronic Temperature Humidity Meters Gauge Indoor Thermometer Hygrometer LCD Display Fahrenheit (℉) for Humidors, Greenhouse, Garden, Cellar, Fridge, Closet

Isn't as accurate as I'd like, about 1-2 degrees in temperature and about 3% difference in humidity sensor. Both of these things are mentioned in the product information so I can't be mad, but if I put two random meters next to each other they are definitely displaying different numbers, but within reason. I'm using primarily for a greenhouse so it doesn't need to be exact, just need a general ball park figure of both readings so it works well for me. Probably not useful for someone who needs very specific temperatures and humidity readings.But for the price, it's totally worth it.

I tested these with other hygrometers and against each other. They seem to be within a few decimals of correct. They also seem to be calibrated the same. They all showed the same humidity for several days in multiple locations and humidity levels.The temperature has slightly more variation. I think there was a maximum deviation of 3 degrees between all 4 hygrometers during my test period. (ie low was 69 and high was 72). Other times and locations they would all be within 1 degree. Not great, but they are SO CHEAP. This is about all you can expect. Probably MORE than you should expect.I would buy them again. They are so cheap you can afford to throw them in different locations and get multiple readings in the same humidor. Big displays make them easy to read.

These are lovely little hygrometers (with included thermometer!!!) that can be easily moved all over the house! They are accurate within 1% of each other and other devices. I had bought a dehumidifier for my basement and was using these in different locations around the basement.One tiny issue I have with them is they look like they are supposed to snap into a framework of some sort. They have open sides and back, which makes it very easy to change the batteries, at least!I don’t mind the open sides. They might look funny placed out on the table or something, but in the basement they are fine. They work great and are clear and easy to read.

Best deal in America for these things and came with batteries only negative and reason I didn't give 5 stars is because 1 of them didn't work think it got crushed or something. Other than that very happy great price and it comes in a pack instead of just 1. Also has same humidity reading as my larger RH meter.

I purchased four of these with the intention of using them in cigar humidors (with a target humidity of 70% at 70 degrees). The four devices show four different humidity levels and four different temperatures. For example, two sensors sitting next to each other read 70% / 69 degrees and 76% / 72.3 degrees. Meanwhile, a much more expensive device sitting next to them reads 66% / 70 degrees. such variance -- a full 10 percentage point swing in humidity -- renders these things useless. I could attempt to calibrate each and add or subtract from the readings each time, but I have no confidence that they are consistent in their mis-reporting. If you need these for humidors, please look elsewhere.

I calibrated these with the salt in a bowl test and they are very accurate, only one of them was 2* off. They look like they would fit into something, I’m not sure what, it could even be in the description. I bought them to monitor my hermit crab habitats and I am very happy with them. I would definitely recommend these and will probably buy more in the future. I hope they last a long time.

These gauges work well and seem mostly accurate. The only concern is that they are all kickstand style with no place to attach a suction cup to hang them at varying levels. If you have a single leveled tank they will work fine but I couldn't imagine why you would need 4 of them in that case.

Not 100% accurate. But, for a dollar apiece what do you expect? A couple degrees and humidity points off completely justifies the price!! And, if one breaks, you have 4 more! I will be buying more. I know they are accurate with a couple percent because I’m using my Inkbird IT608 primarily.

No issues