Desktop CO₂, temperature and humidity monitor with a clear 3.73″ LCD and a professional NDIR sensor. Wi-Fi + Matter — works with Apple Home, Google Home, Alexa, SmartThings and eWeLink.
55 $
Available
Indoor CO₂ climbs fast in a closed room — and you feel it as drowsiness, headaches and poor focus long before you notice the air has gone stale. The Sonoff AirGuard CO2 puts that invisible number on a clear desktop screen, so you always know when it’s time to crack a window or run the fan.
At its core is a professional NDIR sensor accurate to ±(50 ppm + 5%), measuring CO₂ from 400 to 5000 ppm and refreshing the reading every 5 seconds. The large 3.73-inch LCD shows live CO₂ in ppm next to room temperature and humidity at a glance, with switchable °C/°F units — no app needed for a quick check.
When CO₂ rises, AirGuard warns you three ways: an on-device sound alarm, a colour-coded indicator light, and a push notification to your phone. In the eWeLink app it combines your indoor readings with your city’s outdoor air data to suggest the right action, and it keeps a full year of CO₂, temperature and humidity history you can chart and export to spot long-term patterns.
Built on Matter over Wi-Fi, it drops straight into Apple Home, Google Home, Amazon Alexa, SmartThings and Home Assistant, so your air readings sit alongside the rest of your smart home and can trigger automations like switching on a purifier. Ask Siri or your smart speaker for the current level and get an instant, hands-free answer. (Integrating with a third-party Matter ecosystem requires a Matter hub.)
Delivery
Enjoy free standard delivery across Lebanon on orders over $50, or free pickup on orders over $30. We also offer same-day delivery options. For more details, visit our delivery information page.
Returns
We provide a 15-day return window for all orders, subject to certain exclusions. Please note that cash refunds are not available. For complete details, visit our return policy page.
Warranty
Our products are warranted to be free from manufacturing defects. If a product sold by us is found to be defective, we will, at our discretion, repair or replace it with a new one. Certain exclusions apply. For full details, please review our warranty policy page.
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