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BRAND:  yolink        MODEL: YS8006     

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X3 Smart Temperature & Humidity Sensor


The new X3 Temperature & Humidity Sensor includes the features of the YS8003 Temperature & Humidity Sensor, with added battery life (up to 3 years), and advanced sensor data streaming and recording. On-board memory allows for storing over 5000 events in offline mode.
Please note: a YoLink Hub or SpeakerHub is required (see below, in the Required Products section).




Free U.S. Shipping, Orders $50 & Up

Hassle-Free 60 Day Returns

2-Year Warranty

Easy Do-It-Yourself Installation

U.S. Phone Support Available

100% Satisfaction Goal



Home Assistant

Raedius Web Console


  • Smart thermometer and hygrometer monitors, displays, records, and reports to the YoLink app the current temperature and humidity level
  • In addition to the YS8003 Temperature & Humidity Sensor specifications, the new X3 Temperature & Humidity Sensor incorporates advanced sensor refresh, data streaming, and storage, including over 5000 events stored in offline mode.


  • Exceptional value; accurate indoor temperature & humidity sensor in one smart device at a great price
  • Temperature and humidity displayed on the YoLink app
  • Know the current temperature level at the sensor’s location. Check remotely using the YoLink app, anytime and from anywhere
  • LCD display shows current temperature (Celsius or Fahrenheit) and current humidity (%)
  • 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, daily, weekly and monthly figures
  • Exportable data
  • Compact design allows for placing the sensor where others may not fit
  • Easy to install and portable; move to other locations as needed
  • Extremely easy and fast installation using the YoLink app with Scan & Play
  • Wireless operation; no 120V outlet or wiring required
  • 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
  • Uses standard alkaline batteries (2 AAA batteries), included. No Lithium or special batteries required
  • YoLink's industry-leading long range communication and low-power operation
  • Create customized alerts, to be informed of high- or low-temperature or humidity levels via emails or app push notifications
  • Create custom automations using the YoLink app, to trigger responses from other YoLink devices, such as the Siren Alarm or the SpeakerHub, our audio, talking and sound/tone-playing hub
  • Self-calibration available via the YoLink app
  • IFTTT Integration: Use the IFTTT service ( to create custom automation with YoLink and third-party devices, tailored to your particular needs and your IoT devices. Trigger IFTTT applets based on high or low temperature or humidity set points reached (when the device alerts; when it detects a high or low temperature or humidity level, per your pre-set parameters). Please note: IFTTT is a subscription-based service, with only three free automations.
  • Alexa Integration: Voice query Alexa for the temperature (only; humidity not supported at this time). Triggering Alexa routines is not supported at this time.
  • Home Assistant integration: automate and integrate, using the Home Assistant automation platform

  • 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
  • Heat Stress-Ambient Air Monitoring (YoLink Product Solution Bulletin HSM07)
  • Lithium-ion Battery Fire Prevention Enhancement (YoLink Product Solution Bulletin LIB04)

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): 2.70 x 2.70 x 0.94 inches (68.5 x 68.5 x 24 mm)

Multi-color status LED (rear)

SET button (rear)

Power: 2 AA batteries (3V DC)


Operating Temperature Range: -22°F - 140°F (-30°C - 60°C)

Operating Humidity Range: ≤95% (non-condensing)

Intended for indoor use only

  • YoLink Hub or SpeakerHub (audio, talking 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
(1) X3 YoLink Temperature & Humidity Sensor (batteries included)
(1) Quick Start Guide
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YoLink Hub
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SpeakerHub - Hub with Speaker Plays Sounds and Your Text-to-Speech Custom Messages, LoRa-Powered ¼ Mile Range, WiFi Required - YoLink
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Weatherproof Temperature Sensor w/Probe

Q: Is there an Alexa command that will read out the temperature?

 A: Yes, you can query Alexa. If your sensor name is ATTIC TEMP HUMIDITY, as it is in my own home, you can say "Alexa, what is the temperature of the attic temp humidity sensor?" And Alexa will return with "The attic temp humidity sensor temperature is 111 degrees."

Q: How often does the sensor check the temp and humidity for automation? Is the sensor only checked after a certain number of minutes?

 A: The sensor updates the app each hour, minimum, but also updates if any of the following occur:

At least 0.9 F degree change over a period longer than 1 minute

At least 3.6 F degree change within 1 minute

At least 5% humidity changes over a period longer than 1 minute

The device reaches a pre-set high or low alert level (set by the user)

Or the SET button on the device has been pressed.

Q: I see the YoLink hub is required for all smart features. Is there an alternate way to just connect wifi and monitor from ios without the hub?

 A: No, YoLink hub is required. YoLink smart devices use a special wireless technology based on LoRa, which can offer extreme long range (1000 feet compared to 100 for WiFi, outdoors, line-of-sight) and superior obstruction penetration including concrete and metal, but they do not use your WiFi. They need to wirelessly connect to one of our hubs.

This product is a member of the following collections:

Smart Fridge


Smart RV


Do you have questions? We have answers!

Do you have questions? We have answers!

Please fill out the form below, or if your matter is urgent, please call us at  949-825-5958. Please note our Irvine, California office hours: 9AM - 5PM Pacific, Monday through Friday. You may experience waits as we attend to previous customer requests. 

Please fill out the form below, or if your matter is urgent, please call us at  831-292-4831. Please note our Irvine, California office hours: 9AM - 5PM Pacific, Monday through Friday. You may experience waits as we attend to previous customer requests.