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X3 Outdoor Temperature Sensor
- VERSATILE: many applications, including pool/hot tub & fish tank water, wood boiler, fridge and deep freezer, livestock water trough, milk, beer, wine, water, steam and pipe temperature monitoring. Additional uses include composting, HVAC/heating/cooling/ventilation management (YoLink smart plugs and switches purchased separately).
- Long-lasting Performance: X3 Temperature Sensor features an exceptional 5-year battery life, guaranteeing uninterrupted and dependable monitoring of temperature levels over an extended period without the need for frequent battery changes.
- Offline Data Logging: The X3 Thermometer comes equipped with an innovative offline data logger, allowing you to capture and store temperature information even when not connected to a hub. Retrieve and review the recorded data conveniently whenever your device is back online.
- Be Informed of Abnormal Conditions: receive smartphone push notifications, email, SMS notifications when a condition you have set previously is met. Additional notifications and central station monitoring service are optional upgrades.
- Commercial Grade Accuracy and Environmental Range: designed with home and business applications in mind, precision components are utilized, to provide the accuracy you demand. Temperature acccuracy of ±0.54℉ and humidity accuracy of ±3% RH and extended operating range of -22° to 158° F.
- 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.

YoLink Products

Who We Are
YoLink, a brand of YoSmart, was founded in 2014 in Irvine, California, by a team of local engineers. We were the first to apply LoRa technology to smart homes, bringing ultra-long-range and low-power performance into everyday living. With over 300,000 gateways and 2M+ devices online, YoLink delivers exceptional battery life through our patented Radio Wake-Up technology, while D2D (Device-to-Device) Control ensures essential leak-to-shutoff actions work instantly-even without internet or power.
Why We're Different
Smarter: YoLink smart lighting automates your homes with schedules, scenes, and voice control, while consuming minimal energy.
Safer: Lights can be triggered by motion or door sensors via D2D Control, ensuring lights turn on instantly-even without internet.
Farther: With LoRa, YoLink lighting devices maintain reliable coverage up to 1/4 mile, making them ideal for large homes, garages, and outdoor areas.
No Subscriptions
KNOW NOW: be informed immediately of off-normal conditions when you easily set up one or more optional notification methods, including SMS*, phone push notifications, emails, siren and/or SpeakerHub audible notifications for your home or business. *Each YoLink app account receives 5 free SMS per month per device plus five. Additional 200 or 500 SMS are available for 2 and 5 dollars per month, respectively. There are no required subscriptions and the app is always free.
Hubs
First time with YoLink? Make sure to include a hub to begin your smart YoLink Home system, or take a look at our Starter Kits.





Additional Applications
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2-Year Warranty
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Easy DIY Installation
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