Sonoff AirGuard CO2 Monitor

Product Introduction

The Sonoff AirGuard CO₂ Monitor is a smart indoor air quality monitor designed to track carbon dioxide levels, temperature, and humidity in real time. Featuring a high-precision NDIR CO₂ sensor and a clear LCD display, the AirGuard provides instant insight into indoor air quality so homeowners can maintain healthier living environments.

With support for the Matter protocol, the AirGuard integrates seamlessly with major smart home ecosystems such as Apple Home, Google Home, Amazon Alexa, and Samsung SmartThings. This allows air quality data to trigger automation routines like activating ventilation systems or fans when CO₂ levels rise.

Designed for bedrooms, offices, and shared spaces, the AirGuard helps users maintain optimal indoor air conditions while integrating seamlessly into a connected smart home.

Key Features

High-Accuracy NDIR CO₂ Sensor

Uses a professional non-dispersive infrared (NDIR) sensor to measure CO₂ levels with ±(50 ppm + 5%) accuracy for reliable air quality monitoring.

Real-Time Air Quality Monitoring

Tracks three key environmental factors simultaneously:

• CO₂ concentration
• Temperature
• Humidity

Readings refresh approximately every 5 seconds to provide up-to-date indoor air data.

Large LCD Display

A built-in display shows live readings for CO₂ levels, temperature, and humidity directly on the device.

Smart Alerts & Notifications

Receive air quality alerts through:

• Built-in sound alarm
• Visual LED indicator
• Smartphone notifications

Alerts can be customised or muted using a “Do Not Disturb” mode.

Historical Data & Analytics

Stores up to 365 days of environmental data, allowing users to track trends and analyze air quality changes over time.

Smart Automation Integration

Trigger smart home actions such as activating fans, ventilation systems, or HVAC equipment when CO₂ levels exceed predefined thresholds.

Smart Home Integration

The Sonoff AirGuard connects via Matter over Wi-Fi, allowing integration across multiple smart home platforms.

Compatible ecosystems include:

• Apple Home
• Google Home
• Amazon Alexa
• Samsung SmartThings

Through these platforms, users can automate environmental control—for example turning on ventilation systems when CO₂ levels rise or adjusting HVAC settings based on indoor conditions.

Technical Specifications

Product Type: Smart Air Quality Monitor
Model: SAWF-08P
Connectivity: Matter over Wi-Fi (2.4 GHz)
Sensor Type: NDIR CO₂ sensor
CO₂ Measurement Range: 400–5000 ppm
Accuracy: ±(50 ppm + 5%)
Data Refresh Rate: Approx. 5 seconds
Measurements: CO₂, temperature, humidity
Processor: ESP32
Power Supply: 5V USB-C
Operating Temperature: −10 °C to 50 °C
Operating Humidity: 5–95 % RH
Material: PC + ABS housing
Dimensions: 70 × 103 × 26 mm
Weight: Approx. 101 g

What’s in the Box

Sonoff AirGuard CO₂ Monitor
USB-C power cable
User manual