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.