What’s Inside the AirGradient Open Air?

Here’s a quick overview of the main parts inside the device:

See this assembly video, for more insight: Assembling the AirGradient Open Air Kit

1. Open Air Mainboard

The mainboard includes:

• An ESP32-C3 microcontroller that handles processing, Wi-Fi connectivity, and data transmission
• Connectors and pin sockets for all sensor modules
• Power management and onboard circuitry

This board coordinates sensor readings and sends data to the AirGradient dashboard or your own integrations.

2. Plantower PMS5003T PM Sensor

This pre-mounted sensor measures:

• PM1
• PM2.5
• PM10
• Temperature

3. SenseAir S8 / S88 CO₂ Sensor Module

This NDIR (Non-Dispersive Infrared) sensor measures carbon dioxide (CO₂) levels.

4. SGP41 TVOC / NOx Sensor Module

This sensor measures:

• TVOC (Total Volatile Organic Compounds)
• NOx (Nitrogen Oxides index)

Modular by Design

One of the key advantages of the AirGradient Open Air is its modular design.

This means:

• Sensors can be replaced individually if needed
• Maintenance is easier
• Future upgrades are simpler

This open and repairable approach helps extend the life of the monitor and supports long-term reliability.