YoLink Smart Wireless Temperature & Humidity Sensor, Wide Temp Range (-22 to 158 Degree) for Freezer, Fridge, Green House, Pet Cage, Smartphone Alerts - Hub Required

I already had a Yolink hub, and I added a couple of these to my system to monitor the temperature of my two freezers in the garage. I was skeptical about the signal getting out of a metal box, but it worked fine. In addition to preventing spoilage in the event of a power failure--I had a multi-tap power strip fail not long ago and almost lost a freezer full of food--the temperature monitors revealed that one of my freezers cycles between -2 deg. and -14 deg. I should probably replace that freezer soon since that wide a temperature swing suggests that the thermostat is not working well. I recommend this monitor. I have had good luck with all the Yolink products I have purchased.

Used for bearded dragon tank

Nice to be able to check it and get alerts in case power goes out so we don’t lose our frozen meat investment.

I got this to monitor the temperature in a storage shed. I wanted to link it with Alexa and set up a routine to turn on a vent blower at a certain temperature range. Turns out this links with Alexa fine, but only shows the temperature. Thats it. The humidity does not even show in Alexa. You cant even ask Alexa to state the temperature from it, you have to manually look at it. And Alexa will not recognize it to set up a routine like I wanted either for some reason. Well, at least I can monitor the temperature and get a notification from the Yolink app when the temperature gets too high. Keeping it because I might use it elsewhere, but Ill be buying something else to trigger the vent blower.

It seems like some of the complaints on these is that theyre not accurate so just to make sure I purchased several analog and digital temperature sensors to check them against their readings. I must say the temperature readings are spot on or at least within 1 degree of spot on which is pretty friggen accurate for such a small sensor. Overall these were probably the easiest things Ive setup in years and literally just scanned QR codes to get it to work; not a single problem the entire way! For something this affordable, adjustable, reliable, and accurate its one of the best investments Ive made in a long time! Hopefully this company does well because I cant wait to see what other sensors they can add to make my life easier! Ultimately you cant go wrong with these, there literally was zero downsides and I cant say enough good things about them!

I have several of these for cigar humidor. I have calibrated time and again. Every time I get two to match temp and humidity I then put both in humidor and they are then way off from each others by several points. Huge fluctuations and dies not stay calibrated stable-wise. What is the +- accuracy??? Is it low like +- 4% or????

Had an issue with my outdoor fridge and wanted to monitor it. I can see the drastic swings in the freezer temp and humidity due to rising temps here in south Texas. Show just how hard your compressor is working in a hot garage. Also will save you a ton of money in ruined food.

These temp/humidity sensors took the place of my old Acurite hydrometers/thermometers. They were more accurate and now I have alerting through Yolink. Absolutely no issues with connection or distance. Have one in my gun safe too and the signal is very strong.

Ive got these temperature sensors scattered about. There are a couple places I worry about freezing in the winter, and its great to have a sensor in my greenhouse. The alarm went off the other day: it was 95 deg out and the temp in the greenhouse reached 105. Got a notification on my phone and went and opened a skylight. Nice to know I have those sensors watching over things! Also interesting to track humidity in my basement, particularly now that Ive added a dehumidifier. The whole system (hub, etc) works great -- really happy with it.

Transmits from my shop building about 120 ft away from house and alerts me if temperature is getting close to freezing.