What’s inside the AirGradient ONE?

Mainboard ESP32-C3-MINI LED Bar 1.3” (128x64px) OLED display  PM sensor module (Plantower PMS5003) CO2 sensor module (SenseAir S8/S88) VOC & NOx sensor module (Sensirion SGP41) Temperature & Humidity sensor module (Sensirion SHT4x)

What’s Inside the AirGradient ONE?

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

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

1. Open ONE Mainboard

The mainboard includes:

• An ESP32-C3-MINI 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. RGB LED Bar

The pre-mounted 11 RGB LEDs display air quality/device status. It can be switched off.

3. 1.3" OLED Display (128x64px)

The pre-mounted 1.3" OLED display with 128x64px resolution displays real-time air quality measurements and device status. It can be switched off.

4. Plantower PMS5003 PM Sensor

This pre-mounted sensor measures:

• PM1
• PM2.5
• PM10
  

5. SenseAir S8 / S88 CO₂ Sensor Module

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

6. SGP41 TVOC / NOx Sensor Module

This sensor measures:

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

7. SHT40 Temperature & Humidity Sensor Module

This sensor measures:

• Temperature
• Relative humidity

Modular by Design

One of the key advantages of the AirGradient ONE 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.