The SONOFF AirGuard CO₂ (SAWF-08P) is a Matter over Wi-Fi-enabled air quality monitor with NDIR-based CO₂ sensing technology, capable of measuring and displaying real-time carbon dioxide levels, temperature, and humidity. The professional-grade NDIR sensor updates every 5 seconds, quickly responding to changes in indoor air quality.
The device alerts users to high CO₂ levels through sound, light, and app notifications. It also provides personalized tips to improve air quality, using current outdoor data as a reference. With up to 1 year of historical data storage and export functionality, the AirGuard CO₂ supports long-term analysis and helps users develop energy-efficient ventilation habits.
Thanks to Matter support, the AirGuard CO₂ can be easily integrated with Apple Home, Google Home, Amazon Alexa, and SmartThings ecosystems. The measured values can also be used in smart automations – such as activating ventilation or fans when CO₂ is high, or adjusting HVAC operation based on comfort thresholds.
About the SONOFF Brand
SONOFF (ITEAD) is a key player in the DIY smart home market. Their range of products – including relays, switches, sensors, and gateways – offers great value, easy setup, and wide compatibility with platforms such as eWeLink, Apple Home, Google Home, Amazon Alexa, and SmartThings.
Key Product Features
- NDIR accuracy: professional-grade CO₂ measurement with ±(50 ppm + 5%) accuracy and 5-second refresh rate.
- Three-in-one monitoring: CO₂, temperature, and humidity displayed locally and via the app.
- Alerts and tips: sound/light alarms, push notifications, and personalized indoor air quality suggestions.
- 1-year history: stores and displays up to 365 days of data, with export functionality for analysis.
- Matter integration: easy pairing with Apple Home, Google Home, Alexa, and SmartThings (Matter hub required).
- Do Not Disturb mode: temporarily mute alerts and notifications.
Smart Home Protocols & Platform Compatibility
- Protocol: Matter over Wi-Fi (2.4 GHz, IEEE 802.11 b/g/n)
- Ecosystems: Apple Home, Google Home, Amazon Alexa, Samsung SmartThings (requires Matter hub)
- Automation: trigger scenes based on CO₂ / temperature / humidity thresholds (e.g., ventilation, fan, HVAC control)
- Notifications: push alerts via app, sound/light signals on device, optional mute settings
Smart Features
- Real-time monitoring: CO₂ updates every 5 seconds; continuous temperature and humidity tracking
- Air quality recommendations: personalized advice based on indoor readings and outdoor AQI
- History & export: view 365 days of data in charts, with support for exporting logs
- Voice control: compatible with Siri / Google Assistant / Alexa via supported platforms
Technical Specifications
- Product / Model: SONOFF AirGuard CO₂ / SAWF-08P
- Sensor technology: NDIR CO₂ sensor (±50 ppm + 5%); refresh rate: 5 s
- Measured parameters: CO₂, temperature, humidity
- MCU: ESP32-D0WDR2-V3
- Power / connector: USB-C (Type-C)
- Wireless: Wi-Fi 2.4 GHz (IEEE 802.11 b/g/n); Matter-compatible
- Material: PC+ABS housing
- Dimensions / Weight: 70 × 103 × 26 mm; 101 g
- Operating environment: −10 to +50 °C; 5–95% RH (non-condensing)
- Certifications: CE / FCC / RoHS
- FCC ID: 2APN5-SAWF08P
- Box contents: AirGuard CO₂ unit, USB-C cable, documentation
