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Free Shipping to US Destinations, Orders $50+

Brand: YoLink     Model: YS8003     UPC: 850024791442

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  • Smart thermometer and hygrometer:  monitors, displays, records, and reports to the YoLink app the current temperature and humidity level
  • Notifications: phone app push, email, SMS via automation  
  • Automation: control other devices upon your pre-set high or low temperature and humidity set points

Image: free shipping, orders over $50 (US only)
US chat, email phone support available
image: 2 year warranty
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Available Discounts or Specials:
Buy 3 or more and use coupon code THS3orMore12Off for 12% off! Can not be combined with other discounts or sale prices.


  • Temperature and humidity displayed on the YoLink app
  • LCD display shows current temperature (Celsius or Fahrenheit) and current humidity (%)
  • Extremely accurate temperature and humidity figures (+/- .3 degrees Celsius and +/- 3 percent humidity)
  • Self-calibration available via the YoLink app
  • Portable; may be placed anywhere in your home or wall-mounted
  • High/low temperature alerts
  • High/low humidity alerts
  • Historical temperature and humidity graphs displayed in hourly and daily figures
  • Wireless operation; no 120V outlet or wiring required
  • Battery-powered (two standard alkaline AAA batteries, included)
  • Up to 2 years of battery life, compared to 1 year for other brands
  • Alexa and IFTTT integration
  • YoLink’s industry-leading long range communication and low-power operation


  • Exceptional value; accurate temperature and humidity sensor in one smart device at a great price
  • Works with the convenient and user-friendly YoLink app
  • Know the current temperature and humidity level at the sensor’s location. Check remotely using the YoLink app, anytime and from anywhere
  • Create customized alerts, to be informed of high or low temperature and/or humidity levels via emails or phone notifications
  • Create custom automation using the YoLink app, to trigger responses from other YoLink devices, such as the Siren Alarm
  • Use the IFTTT service ( to create custom automation with YoLink and third-party devices, tailored to your particular needs and your IoT devices (IFTTT is a paid service for more than 3 custom automation)
  • Compact design allows for placing the sensor where others may not fit
  • Easy to install and portable; move to other locations as needed
  • Lower cost of ownership than other technologies; low-power operation means batteries may last over 2 years, compared to 1 or less from other brands
  • Carefree maintenance, with more years between battery replacement
  • Low-battery alerts give you advanced warning that it is almost time to replace the batteries
  • Uses standard alkaline batteries (2 AAA batteries); no Lithium or special batteries required
  • Extremely easy and fast installation using the YoLink app with Scan & Play

  • Use the YoLink smartphone app to remotely monitor the temperature and humidity of your home, rental property, condo, summer home, or business (internet connection and YoLink Hub required)
  • YoLink’s industry-leading long range communication allows for placing the sensor in your out-buildings, separate garage building, barns, greenhouse, etc.
  • Place one in each room your wish to keep an eye on the temperature and humidity.
  • Place the sensor in a basement or other area subject to mold and mildew growth due to high humidity levels. Identify problem areas before expensive repairs are required
  • Use the sensor and app automation features to automatically turn on the exhaust fan in your bathroom during hot showers and baths
  • Use the sensor and app automation features to automatically turn a humidifier or dehumidifier on or off based on sensor levels
  • Monitor your cigar humidor, wine cellar, or any other temperature- and/or humidity-sensitive item or area
  • Place inside a refrigerator or freezer, to prevent the loss of expensive refrigerated and frozen foods due to equipment failure or power loss
  • Monitor the temperature of rooms or buildings without temperature control, for example, receive a low-temp alert before water pipes freeze
    • There are numerous pet care applications:
    • For reptile tanks (turn on a heat lamp if the temperature gets too low, or turn off the lamp if it gets too hot)
    • Place one an outdoor dog house, to know if it’s too cold for them
    • Place in a barn, to ensure your horses or livestock are comfortable and safe
    • Receive alerts if sensor levels fall outside of your customized ranges



      • YoLink Hub with an internet connection (wired Ethernet or 2.4GHz Wi-Fi). Refer to the Hub user guide for additional information
      • Smartphone or tablet running iOS 9 or higher, Android 4.4 or higher
      • Tools Required: None (Unless wall-mounting, optional)
      • Installation Difficulty Level: Super Easy


      • Semtech® LoRa® RF Module YL09 microcontroller with 32-Bit RISC processor
      • Color: White
      • Display: Monochromatic LCD
      • Data Displayed: Temperature, humidity, low-battery indicator
      • Dimensions (L x W x D): 2.44 x 2.44 x 0.93 inches (62 x 62 x 23.5 mm)
      • Multi-color status LED (rear)
      • SET button (rear)
      • Power: 2 AAA batteries (3V DC)
      • Environmental:
      • Operating Temperature Range: 14°F – 122°F (-10°C – 50°C)
      • Operating Humidity Range: ≤95% (non-condensing)
      • Intended for indoor use only




      • (1) YoLink Temperature & Humidity Sensor (batteries included)
      • (1) Quick Start Guide