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 started out using YoLink water sensors September 2020 (4 sensors w/ hub). Installed them in my finished basement and laundry and didnt really give them much thought until I received my first notification/alert, I was doubtful but immediately went to check and low and behold, I had a slow leak in a slop sink. These sensors saved me from a HUGE headache. I went and bought another 4 pack and have these sensors EVERYWHERE. Now that I have the water issues under control, I have started to work on humidity & temperature in my home with their sensors. Temp & humidity sensors are just as easy and accurate! These are great products and I look forward to what new products will be released next.

This sensor is affordable, easy to set up an has a incredibly long range including excellent wall and freezer door penetration. Customer service is quick and helpful. I have only one issue, which they have said they will fix in an upcoming release, which is that the alarm can not be used in a freezer scenario. As you see in the photo, all freezers are below temp threshold, so they would alarm continuously. They are reducing the lower limit to address this soon. In the future I hope they offer an even lower cost version without the LCD display which is very nice but useless when inside a freezer or other place I can’t see... I look forward to testing their other sensors soon.

I bought this to place in the storage compartment of my trailer which I live in during the freeze in Texas (Dec 2022) so I would know I needed to turn on the heater to prevent my pipes from freezing. Worked perfectly. I would recommend this to everyone who needs to monitor any temperature. Easy to set up and easy to use. Yo link has the sensors needed for various items as well all controlled in one app.

I did not have high hopes since I am expecting a device to communicate through block walls AND metal shed walls....BUT it is actually picking up a good signal! I am super impressed so far and I will continue to monitor and tinker with it this weekend. This device may have found a new home! Now I wish YoLink would make security cameras! You listening YoLink? Give us cameras! edited to add: This wifi hygrometer is amazing. It only lost signal one time, and thats when some guys installing a new fence for me cut my cable on accident. I was immediately alerted that connection was lost. I left work and pulled up to my house and asked why they cut the cable...they were baffled how I knew. lol I also sent an in app message to the developers and surprisingly received an email back within 12 hours.

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.

I have been using home automation products for several years but I never found a good solution to monitor fridge and freezer temps. We have 4 freezers and I have purchased one of the smart wireless temperature sensors for each. I have found these to be reliable and its great that you can set up alerts in the YoLink app to send a message to your mobile device as well as sound an alert on the hub when it goes out of range. It doesnt update continuously more like every couple minutes or degrees of change so it gives you time to put away groceries without driving you crazy but if you accidentally leave a door slightly open it notifies you quick enough that you cant drive too far away when leaving the house before you are notified.

This device warned me when our refrigerator/freezer was on the fritz. It was a gradual decline, which I was able to monitor to the apps history feature. Yes, our refrigerator/freezer failed, but the YoLink temperature sensor provided a blow-by-blow description as the temperature rose. And, the device allowed me to monitor the temperature after I had added dry ice, as a stop gap prior to the arrival of the repair person. But, whats particularly impressive, after I put the device in our cooler it was immersed in water and ceased working. Thinking that it was toast, I thought I might revive it by putting it in a container of rice. Alas, five days later, I inserted new batteries, and, low and behold, it came back to life! In the meantime I had order another from Amazon. So, now we have digital temperature gauges in both the freeze and refigerator to alam us to our next problem. This device is super easy to set up and works like a charm!

I got 2 of these and 1, as you can see, has a bad display. Its not worth the effort to send it back so I hope they improve their quality control/packaging. Not the only yolink issue Ive had either. UPDATE: I made contact with YoLink and they made it right. They sent me a replacement, at no cost, without having to return the bad one. While they may be experiencing some growing pains they do stand behind their products which I appreciate. I do wish the history could be deleted and that reporting times could be adjusted but overall its a good sensor and company.

I use several YoLink sensors to monitor for leaks and these for monitoring our refrigerators while we are traveling. I can check the condition of things around the house from anywhere on my phone. Gives me piece of mind along with my security cameras.

Bought this to monitor the because it had a better range than other options. I needed to monitor the temperature/humidity in a coldfrrame in my garden. It’s down the hill from my house so I wasn’t sure if it would have the range I needed. Just pugged it in and set it in the cold frame. It works great! I think I will buy another for my small greenhouse in the same location!