Smart Wireless Temperature Sensor/Humidity Sensor Wide Range (-22 to 158 Degrees) for Fridge Monitoring Pet Cage/Tank Monitoring, Smartphone Alerts, Compatible with Alexa IFTTT – Hub Included
Original price was: $45.99.$39.99Current price is: $39.99.
From the brand
DON’T TRY THIS WITH WiFi! Our unique LoRa-based sensors are different from WiFi, Zigbee, Z-Wave and most other wireless smart sensors in that they are extreme long-range (up to 1/4 mile open-air), low-power (years between battery changes), and work outdoors*, on other floors, and even in a metal box (like a fridge or mailbox)!
MONITOR & MANAGE your temperature and humidity concerns, whether it’s a fridge, a barn or bedroom, a chicken coop or a dog kennel, a plant nursery or your child’s nursery – anywhere! *Consider one of our weatherproof sensors, designed for outdoor use
ECONOMICAL SMART FRIDGE! Save thousands when you make ANY fridge smart (or smarter) with YoLink smart sensors. Start with temperature sensors, then add door/lid sensors, leak sensors and a Power Fail Alarm.
IFTTT & Alexa Integration: trigger IFTTT applets based on high or low temperature set points reached (when device alerts). Voice query Alexa for the temperature (only; humidity not supported at this time). Triggering Alexa routines is not supported at this time.
PLUG, PLUG & PLAY! Take advantage of direct ethernet connection and be online almost instantly when you plug your Hub into your router or network switch. Or, use hot spot mode to connect to your WiFi network in moments. Add devices in seconds using our Scan & Play QR code scanner in the app! Set your notification preferences, test your new sensors, then enjoy years of trouble-free operation!
KNOW NOW! You have many options for being notified of device activity! Receive a text, receive an email, receive a phone push notification (including Apple phone “Critical Alert” severe weather/Amber alert type notifications that will activate your phone even if in silent mode. Android phones offer similar functionality, depending on phone manufacturer). SMS messages are limited to the total of 5 times each device plus 5. A hub and one sensor provides you with 15 free SMS per month.
9 reviews for Smart Wireless Temperature Sensor/Humidity Sensor Wide Range (-22 to 158 Degrees) for Fridge Monitoring Pet Cage/Tank Monitoring, Smartphone Alerts, Compatible with Alexa IFTTT – Hub Included
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JP –
Super easy setup, great app, really does work from inside a metal fridge. Alerts work well.
Setup:Setup could not be easier.1. Install app,2. setup hub3. add sensor(s).4. Update Firmware.To make the hub setup quick and easy it’s best to connect the hub to your router with an ethernet cable. The instructions have you scan a barcode on the hub using the app to register it, then power it up. It came online within a few seconds. WiFi can then be setup while it is connected via ethernet cable. If you wish to use WiFi power off and relocate the hub. It takes about 30 seconds to join WiFi after being powered up.Adding the sensor(s) is similar. Scan the barcode on the device with the app, then turn it on using a switch on the back of the unit. It will connect to the hub quickly. It is best to configure all the alerts and other settings while you have the sensor on a desk, then when the configuration is complete place the sensor where it is needed.Both the hub and sensor had the latest firmware as delivered which is awesome.Use:The LCD’s still work even at freezer temperatures of -5f. The batteries in the LCD sensors will not last very long in a freezer. maybe 9 months, I have ordered some sensors that do not have an LCD and come with Lithium batteries good for 5 years.I’m really impressed how well the sensors work inside a freezer clear the other side of the house from the hub. It lives up to the hype. Sensors contact the hub about once per minute.App:The app is very good, there are some really detailed statistics you can view and there is an option to download data. I have included a screen shot of one of the charts showing a 24 hour view,Alerts:After setting thresholds, alerts can be sent via the app on your phone, an email, or SMS. SMS is limited to 15 SMS’s per month but email works just fine and has no limit.Yolink Eco system:The number and variety of devices you can add to the hub is impressive. Given how easily the system and app works I’ll be adding devices in the future.Highly recommended.Update:Jan 2026.The batteries showed half a charge after 14 months in a fridge. I replaced the alkaline AAA batteries with Energizer Lithium cells.
Linda –
Remote monitoring
I needed to be able to monitor a house several states away to ensure it did not get too cold. Set up was not that hard but I did need to do it twice to get everything set the way iwanted it. I tested the remote alarm feature and it worked. It has been working now for several months.
Ken Ray –
Six stars! Great product
I would give this product 6 stars. We had this set up and accessible on the app in less than three minutes. The app design is simple and intuitive with no subscription fees. With the hub we can add other Yo products. We have the A/C thermostat, a local T&H sensor, and now the Yo, all are within 1 degF and 1% humidity of each other so accuracy seems good. One small complaint; there seems to be a long lag in the sensor response when there is a temperature change. We bought this to monitor our condo when we are away and for that this is perfect and a great value.
biblio –
Cheap peace of mind!
I wish I would have installed this immediately after I received it! It would have saved me hundreds of dollars and hours upon hours of prepared meals that were lost. Live and learn.This little device is well worth it! Very easy set up and it is sensible to minor temperature changes. I get multiple alerts when the temperature or humidity has changed. I was literally ready to sell my freezer that was only a couple of years old. I live in Costa Rica and there are unpredictable power outages and/ or surges that have caused the freezer to go out. No more. Recommend without hesitation.
jazzyboydc –
Good sensor but needs updates
Good sensor. It does work. Even in a cold freezer. However as of 8/18/2025 the alerts and automations in the app still need some help. Alerts work but are hard to program. If u want to monitor stuff it is perfect. No signal issues or nothing. Can see sensor data wherever I am. But as I said, alerts and automations need help.
Douglas Delp –
Works great!
Works great! Setup and pairing was easy!
Nancy S. –
Works great.
Was unable to link Hub from WIFI(probably due to wifi 5GHZ blocking 2.4 GHZ), but was a quick link after direct Ethernet hard wire. Works great now. For easy install: down load APP to cell phone. Plug in Hub to supplied power supply. Use supplied ethernet cable to plug into your router. then click onto Hub icon on App. You will be prompted to enter WIFI password from your router. Then it should link up. Then added temperature/humidity sensor. Happy with purchase.
Dorie –
Not a reliable option
Do not buy this if you want to be reliably alerted in any sort of manner to temperature/humidity changes unless the sensor is going to be right next to you at all times.I got this to alert me to my garage freezer becoming too warm, and while the thermometer is accurate the alerts do not work consistently. The sensor in the freezer makes a beeping sound, which would be useful if it weren’t located in a freezer in my garage, but the app notifications have failed twice – causing me to lose an entire freezer’s worth of food both times. After the last time I have disposed of this and will be looking into other options.
Stephan Gruber –
Grundsätzlich funktioniert das Produkt sicher gut aber das Problem ist das es aus Amerika kommt und über den US Server läuft.Zusätzliche Geräte bekommt man nur sehr schwer über die Amerikanische Seite und dort wuchern die Preise wegen des Versandes + Zollgebühren.Ein anderer Anbieter aus England auf Amazon hat nur Sensor ohne Hub verkauft, hab den dann aber nicht mit diesen Hub verbinden können, da der Sensor Plötzlich eine andere Typennummer hatte, und der dann auf dem EU Server laufen sollte.Für EU habe ich aber keinen anderen Anbieter mehr gefunden und schließlich alles wieder zurück geschickt.