6 Pack Mini Hygrometer Indoor Humidity Meter, Small Digital Thermometer Humidity Gauge Meter, Indoor Thermometer Hygrometer Monitor Fahrenheit (℉) for Thermostat Reptile Tank, Mason Jars

These work great and help me monitor the conditions in my plant acclimation boxes easily and accurately. Well worth the money. Highly recommend!

These arrived already powered up and working , I compared all 6 to two larger ( much more expensive) , Temp / Hygrometers , all 6 of these small meters were within 1-2% humidity and 1-2 degrees temperature , most were within one % hum./degrees temp. I am happy with purchase . This is ; InMyOpinion .

These sensors are cheap. Humidity is known as a hard quantity to measure. I put all of them in the same place for several days. They all read the same +/- 1. I also compared with my $50 sensor with which they agreed.

Good little hygrometers. I got them so I could stick them in a handful of instrument cases to monitor in-case humidity levels during the winter (along with a stretto hyrdration pack). I assumed since they were so small and cheap I was going to have to calibrate them, but right out of the box they were all within 1% of my master room hygrometer which is accurate enough for my purposes. The prices is right and they're small which is ideal for my uses. The only issue I have is that they can be hard to stick in the case. This is probably an issue specific to me, but I wanted to put a dual lock strip on the back of it (or something similar) to mount inside my case. Unfortunately, the majority of the back of these units is taken up by the sliding panel for the battery. This leaves a VERY small area that you could mount some adhesive which means there's a better chance it could end up unsticking at some point. I made it work for my mostly stationary cases, however if I needed to carry the cases around more, I'd need to find a better way to mount them so they wouldn't pop loose and bang around in the case. The other issue is that there's no backlight on these hygrometers. That should be expected for devices at this price point, but in my case, it means that I often have to use the flashlight on my phone to read them because when they're mounted in my case, they're often in a recess that casts a shadow and it can make it difficult to read. It might be nice to be able to just press a button and get a momentary backlight to see the readout better, however that would also be a more expensive device. You can't expect all the bells and whistles when you buy cheap. All in all, if you need some cheap small hyrgrometers, I think these are serviceable.

These work great, all accurate to each other. Durable, hold up to high humidity and easy to read. Small enough for a multitude of applications. Have been using non stop for months to monitor humidity near my indoor plants.

This item works great! Accurate and easy to read. You can stand the item on it’s edge or attach with velcro/hook and loop or even glue to the surface you want to monitor.

For the most part, this product works however at times it can be inaccurate. They are durable and have good battery life but the internal sensor maybe needs some engineering. They balance easy so no mounting or anything. Easy to see from different angles. Easy to move wherever you want to use it at.

I needed a hygrometer to monitor my dry case. This six-pack is great! The accuracy matches my other hygrometers close enough (within a couple of % of the other hygrometers). The batteries are replaceable. I don't know what sort of battery life I'll get, but I'm happy enough with these.