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Fresh Air Friend CO2 Sensor

Portable NDIR (Non-Dispersive Infrared) CO2 sensor that detects carbon dioxide levels in the surrounding environment, as well as temperature and humidity. Its compact and portable design allows you to take it with you wherever you go to ensure a fresh air environment. The sensor comes with a rechargeable lithium-ion battery and a USB cable for convenient charging.

Product Features

The Fresh Air Friend CO2 Sensor offers a range of features that make it an essential tool for ensuring optimal indoor air quality. Key features include:

1. NDIR CO2 Sensor: The advanced non-dispersive infrared CO2 sensor measures carbon dioxide levels in real time (accurate to +/- 50 ppm) so you can stay informed about the air quality in your surroundings and take control to ensure a a healthier environment.
2. Temperature and Humidity Monitoring: Alongside CO2 detection, this sensor provides continuous temperature and humidity measurements. Monitor the ambient temperature and humidity levels to monitor conditions that can affect mould growth and proliferation of other allergens.
3. Portable and Compact Design: The compact and lightweight design of the Fresh Air Friend CO2 Sensor allows you to easily carry it with you wherever you go. Whether it's your home, office, classroom, or any other space, you can ensure you are breathing well ventilated air.
4. Rechargeable Lithium-ion Battery: The built-in rechargeable lithium-ion battery provides long-lasting power, eliminating the need for frequent battery replacements. Simply connect the included USB cable for convenient charging.
5. User-friendly Interface: The sensor features a user-friendly interface with a clear digital display, making it easy to read and interpret the CO2, temperature, and humidity measurements. The LED screen can be dimmed to preserve battery whilst still having the colour coded CO2 safety level indicator on display.
6. A Device to Promote Health and Safety: With the Fresh Air Friend CO2 Sensor, you can take proactive steps to maintain healthy indoor air quality. By monitoring CO2 levels, temperature, and humidity, you can make informed decisions about ventilation and create a healthier and more comfortable environment for yourself and those around you.


  • CO2 Sensor Type: NDIR (Non-Dispersive Infrared)
  • Measurement Range: 0-5000 ppm
  • Temperature Range: -10°C to ~40°C
  • Humidity Range: 20-80% (+/- 5% relative humidity)
  • Battery: Rechargeable Lithium-ion
  • Charging: USB cable (included)
  • Dimensions: Diameter 8.3cm x Thickness 3.2 cm
  • Weight: 150 grams