ModuleAir

Open source sensor for measuring indoor air quality

Frequent Questions

No, WiFi connection is not required. The ModuleAir sensor displays measurement data directly on its screen and updates every 2 minutes. It operates autonomously without internet connection.
⚠️ Important: The sensor has no local data storage capability. To maintain measurement history, WiFi connection is necessary for data transmission to our servers.
The sensor only connects to standard home 2.4GHz WiFi networks with WPA-PSK authentication (standard security key).

Technical incompatibilities:
  • 5GHz WiFi networks
  • Networks with captive portals (WPA EAP enterprise, Eduroam)
  • Enterprise networks blocking unauthorized devices
Corporate, university, and public institution networks are generally incompatible. Home networks typically function normally.
Module Air sensors fully comply with indoor air quality monitoring regulations in ERPs for direct CO₂ concentration measurement.

Compliant technical specifications:
  • Non-dispersive infrared absorption spectrometry (NDIR)
  • Measurement range: 0 to 5,000 ppm
  • Uncertainty: ± (50 ppm + 5% of reading)
  • Complete display including values < 400 ppm
  • Daily automatic calibration
  • Manual calibration per CSTB procedure
Validated for spot measurements in ventilation system assessment.
The NextPM sensor, manufactured in France, has been evaluated by South Coast AQMD (California) and certified as a high-performance measurement tool.

Precise measurement of PM1, PM2.5, and PM10 particles according to professional standards.

ModuleAir

A fully transparent and open source citizen sensor for comprehensive indoor air quality monitoring.

Because air pollution is an issue that concerns us all, we have imagined a completely transparent sensor whether in its operation or in its design. Thanks to our tutorials and workshops you will always be able to repair, improve and modify your sensor because we want at all costs avoid planned obsolescence and reduce our impact on the environment.

The Module Air sensor measures CO2, fine particles, temperature and humidity. The information is displayed on a large 20x10cm LED screen. The sensor requires to be connected to the mains to operate. It is possible to connect the Air Module to your WiFi network to view the measured data and download it.

The Air Module is equipped with a high-end French-made sensor: the NextPM. This allows the Air Module to measure PM10 and PM2.5 and PM1 with great precision. The NextPM was recently the subject of a comprehensive assessment by the US West Coast Air Quality Monitoring Agency (South Coast AQMD) and has been reported as a high performance measurement tool.

🌍 ModuleAir already adopted
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Technical specifications
  • CO2 sensor: MH-Z19
  • PM sensor: NextPM (French-made, high precision)
  • Temperature/Humidity sensor: BME280
  • LED Matrix screen 64*32 (20x10cm display)
  • Microcontroller ESP32 with WIFI connection
  • Power via USB 5V
  • Size: 16x8x4.5cm
  • Weight: 300gr
  • Plastic case
360 € including tax

Shipping costs not included

📦 Delivery time: 3 to 5 weeks
Each ModuleAir is carefully prepared to order
Order ModuleAir
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