SONOFF AirGuard CO2 Matter Over Wi-Fi Air Quality Monitor / SO-SAWF-08P
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Code:SO-SAWF-08P
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Weight:0.000 Kgs
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High-Precision NDIR CO₂ Sensor: Measures CO₂ (400–5000 ppm) with ±(50 ppm + 5%) accuracy and 5-second refresh rates.
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Universal Matter over Wi-Fi Compatibility: Direct integration with Apple Home, Google Home, Amazon Alexa, SmartThings, and Home Assistant.
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3-in-1 Climate Tracking: Monitors CO₂ levels, indoor temperature, and relative humidity simultaneously.
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3-Way Alert System: Audible buzzer, visual light indicator, and instant smartphone push notifications with a Do Not Disturb mode.
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365-Day Historical Data & Export: Stores up to 1 year of environmental data with graph views and CSV export.
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Continuous USB-C Power: Reliable 5V/1A power supply for uninterrupted operation.
The SONOFF AirGuard CO2 (Art. No. S0 SAWF 08P / Model: SAWF-08P) is a next-generation smart air quality monitor designed to deliver precise, continuous indoor environmental control for your home, office, classroom, or nursery. Equipped with a professional-grade NDIR photoacoustic sensor, it tracks carbon dioxide CO₂ concentration, indoor temperature, and relative humidity in real time to help you maintain a healthy, safe, and productive environment.
Thanks to official Matter over Wi-Fi certification, the SONOFF AirGuard CO2 removes ecosystem barriers and integrates seamlessly with Apple Home, Google Home, Amazon Alexa, Samsung SmartThings, and Home Assistant.
Key Features & Major Upgrades
1. Universal Matter over Wi-Fi Compatibility
Eliminate complex setups and brand lock-in. Adding the device to your preferred smart home ecosystem is as simple as scanning a QR code. Thanks to Multi-Admin support, you can monitor and control air quality simultaneously across multiple platforms—such as Apple Home on an iOS device and Google Home on an Android tablet.
2. Professional NDIR Sensor Technology
Unlike common CO₂ sensors that only estimate CO₂ based on general volatile organic compounds (VOCs), the AirGuard CO2 utilizes a true NDIR (Non-Dispersive Infrared) photoacoustic sensor. It accurately measures actual carbon dioxide molecules in the range of 400 to 5000 ppm with an accuracy of ±(50 ppm + 5%) and rapid 5-second refresh rates.
3. Triple Alert System & Do Not Disturb (DND) Mode
When CO₂ levels cross safe thresholds, the monitor alerts you immediately via:
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Audible Alert: Built-in buzzer with clear acoustic signaling.
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Visual Indicator: Color-coded status updates on the screen.
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Push Notifications: Instant smartphone alerts via the eWeLink app.
To ensure uninterrupted rest, a dedicated Do Not Disturb (DND) mode mutes sound and dims light alerts at night while maintaining continuous background monitoring.
4. 365-Day Historical Data & CSV Export
The app stores detailed graphs for CO₂, temperature, and humidity for up to 365 days. Data can be exported into a CSV file for in-depth environmental analysis—ideal for offices, schools, or commercial facilities.
5. Smart Ventilation Automations
Link the AirGuard CO2 with other smart home devices. When CO₂ levels exceed a predefined threshold (e.g., above 1000 ppm), the monitor can automatically trigger smart relays or plugs (such as the SONOFF Basic Gen5, MINI, or Smart Plugs) to turn on an exhaust fan, ERV/HRV system, or motorized window opener.
Why CO₂ Monitoring Matters
Extended exposure to high indoor carbon dioxide levels leads to drowsiness, headaches, reduced concentration, and poor sleep quality:
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Below 800 ppm: Excellent, fresh air-optimal environment for work and sleep.
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800 – 1000 ppm: Acceptable level; brief ventilation is recommended.
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Above 1000 ppm: Stale air-causes fatigue, drowsiness, and loss of focus.
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Above 1500 ppm: Critical level-causes severe headaches and dizziness; requires immediate ventilation.
Technical Specifications
| Parameter | Specification |
| Brand & Model | SONOFF AirGuard CO2 (Art. No. S0 SAWF 08P / SAWF-08P) |
| Sensor Technology | Photoacoustic NDIR Sensor (Sensirion) |
| CO₂ Range | 400 – 5000 ppm |
| CO₂ Accuracy | ±(50 ppm + 5%) |
| Refresh Rate | Every 5 seconds |
| Temperature Range | -10°C ~ 50°C (± 0.5°C) |
| Humidity Range | 5% ~ 95% RH (± 3% RH) |
| Display | 3.73-inch clear LCD screen |
| Wireless Protocol | Matter over Wi-Fi (IEEE 802.11 b/g/n 2.4GHz) + Bluetooth |
| Power Supply | 5V DC / 1A via USB Type-C (Cable included) |
| Supported Ecosystems | Apple Home, Google Home, Amazon Alexa, SmartThings, Home Assistant, eWeLink |
| Enclosure Material | PC + ABS (Flame-retardant V0) |
| Certifications | Matter, CE, FCC, RoHS |
What's in the Box?
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SONOFF AirGuard CO2 Air Quality Monitor (SAWF-08P)
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USB Type-C Power Cable
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User Manual with Matter QR Setup Code
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Dimensions:70 × 103 × 26 mm
Who it’s for
The SONOFF AirGuard CO2 Matter Over Wi-Fi Air Quality Monitor is an essential tool for home office professionals and remote workers who often experience fatigue, reduced concentration, or headaches due to undetected high CO2 levels in enclosed workspaces. It provides the real-time insights needed to maintain optimal air quality, boosting productivity and well-being.
It's also designed for proactive parents and families concerned about the invisible impact of poor indoor air on their children's health, sleep quality, and learning environment in nurseries, bedrooms, or living areas. This monitor offers peace of mind through continuous monitoring, allowing for timely adjustments to ventilation and a healthier home.
Finally, smart home enthusiasts and tech-savvy integrators will find it invaluable for seamlessly incorporating precise CO2 data into their Matter-compatible smart home ecosystems. It enables advanced automation scenarios, such as triggering smart ventilation systems or air purifiers when CO2 thresholds are exceeded, creating a truly responsive and healthy living space.
Key features
Here is a list of 'Key Features' for SONOFF AirGuard CO2:
- Precise CO2 Reading: Measures carbon dioxide levels with high accuracy, covering a wide range from 400 to 5000 ppm and ensuring reliability with a typical deviation of ±(50 ppm + 5% of the reading).
- Matter over Wi-Fi Support: Integrates seamlessly into your smart home ecosystem via Wi-Fi 2.4 GHz, enabling universal compatibility and secure local control according to the Matter 1.0 standard.
- Real-time Monitoring: Provides instant air quality updates with a refresh rate of 5 seconds and allows configuration of up to 3 customizable CO2 threshold values.
- Integrated Temperature and Humidity Sensors: Includes additional sensors for comprehensive environmental analysis, measuring temperature with an accuracy of ±0.3°C and humidity in a range from 0% to 99% RH.
- Clear LED Display: Equipped with a visible display that simultaneously shows up to three key parameters and utilizes intuitive tri-color light indication for quick CO2 level assessment.
- Convenient Power Supply: Continuously powered via a universal USB-C port, ensuring uninterrupted monitoring and low power consumption under 5V/1A.
Unique differentiators
The SONOFF AirGuard CO2 doesn't just measure air quality; it redefines it, setting a new benchmark for smart home integration and precision monitoring. Unlike standard CO2 detectors that often rely on proprietary apps or limited connectivity, the AirGuard CO2 is one of the first and most advanced CO2 monitors to offer full Matter 1.0 over Wi-Fi integration. This means unparalleled universal compatibility and secure local control with virtually any Matter-enabled smart home ecosystem, ensuring your data remains private and accessible.
While many alternatives provide basic readings, the AirGuard CO2 delivers industry-leading CO2 measurement accuracy, with a typical deviation of just ±(50 ppm + 5% of reading) across a broad 400-5000 ppm range, surpassing many competitors in reliability. Furthermore, it boasts the fastest real-time monitoring available, refreshing air quality data every 5 seconds, allowing for immediate insights and proactive adjustments to your environment. This comprehensive approach is further enhanced by its integrated temperature (±0.3°C accuracy) and humidity sensors, providing the most complete picture of your indoor climate from a single device.
Here's how SONOFF AirGuard CO2 elevates your air quality monitoring experience:
| Feature | SONOFF AirGuard CO2 | Standard Alternatives |
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| Smart Home Protocol | Matter 1.0 over Wi-Fi (Universal, Local Control) | Proprietary App / Limited Zigbee/Z-Wave (Hub-dependent) |
| CO2 Measurement Accuracy | ±(50 ppm + 5% of reading) | Typically ±75-100 ppm or higher |
| Real-time Refresh Rate | 5 seconds (Fastest in class) | 30-60 seconds or longer |
Why this product
Why Choose SONOFF AirGuard CO2?
Ever wonder if your indoor air is fresh enough, even when windows are closed? High CO2 levels can silently impact your focus and sleep quality. The SONOFF AirGuard CO2 eliminates this guesswork, giving you precise, constant awareness of your environment. It accurately measures CO2 from 400 to 5000 ppm, with a reliable deviation of just ±(50 ppm + 5% of reading).
Building a truly smart home often means juggling multiple apps and compatibility issues across brands. This can be frustrating and limit automation potential. The AirGuard CO2 solves this by integrating effortlessly into your existing smart ecosystem. With Matter 1.0 over Wi-Fi 2.4 GHz support, it ensures universal compatibility and secure local control with other Matter devices.
You need more than just CO2 data; a complete picture of your indoor climate is essential for optimal comfort and health. Slow updates are unhelpful. This device provides instant, comprehensive environmental insights, empowering proactive adjustments. Enjoy real-time CO2 updates every 5 seconds, alongside integrated sensors delivering temperature accuracy of ±0.3°C and humidity from 0-99% RH.
Complicated interfaces make monitoring air quality a chore. You need clear, actionable information at a glance, not confusing data. The AirGuard CO2 simplifies monitoring with an intuitive, highly visible display design. Its clear LED shows up to three key parameters simultaneously, using a smart three-color light indicator for quick, effortless CO2 level assessment.
FAQ
SONOFF AirGuard CO2 FAQ
Why choose AirGuard CO2?
Question: Why choose AirGuard CO2? -> Answer: The SONOFF AirGuard CO2 monitor is essential for a healthy indoor environment. High CO2 causes fatigue and poor focus. It alerts you to ventilation needs, improving air quality and well-being at home or office.
What does AirGuard CO2 measure?
Question: What does AirGuard CO2 measure? -> Answer: The SONOFF AirGuard CO2 primarily measures carbon dioxide (CO2), a key indoor air quality indicator. It provides precise, real-time data, helping you assess ventilation and improve air freshness for a healthier atmosphere.
AirGuard CO2 accuracy?
Question: How accurate is AirGuard CO2? -> Answer: The SONOFF AirGuard CO2 monitor offers high accuracy via its advanced NDIR sensor. It provides reliable, precise real-time CO2 readings for informed indoor air quality decisions. Easy app calibration maintains optimal performance.
How to set up AirGuard CO2?
Question: How to set up AirGuard CO2? -> Answer: Setting up SONOFF AirGuard CO2 is quick. Plug it in. Use the SONOFF or Matter-compatible app to connect to Wi-Fi. Follow in-app steps for easy setup, calibration, and alarm thresholds to monitor air quality instantly.
Is AirGuard CO2 smart home compatible?
Question: Is AirGuard CO2 smart home compatible? -> Answer: Yes, SONOFF AirGuard CO2 is highly compatible with smart home systems via Matter over Wi-Fi. Seamlessly integrates with Apple Home, Google Home, Alexa, and SmartThings. Enjoy centralized control and automation without extra hubs.
