Sensirion SCD4x Carbon Dioxide (CO2) Gadget

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The Sensirion SCD4x Carbon Dioxide (CO2) Gadget is a simple reference design circuit board that demonstrates the performance and ease of use of Sensirion’s SCD4x CO2 sensors. The SCD4x CO2 Gadget features an RGB LED, with the traffic light color scheme, indicates the indoor air quality based on the measured CO2 concentration. It also incorporates a BLUETOOTH® Low Energy module to communicate with BLUETOOTH® Low Energy (BLE) capable devices like smartphones. Power is supplied via a standard USB interface. The CO2 Gadget application runs with Android 4.4 or later and iOS 9.0 or later, respectively.

  • SCD41 CO2 sensor
  • Compact 53mm x 19mm x 13mm form factor
  • BLUETOOTH® Low Energy (BLE) connectivity to iOS and Android smartphones
  • Free MyAmbience iOS and Android app available
  • Data logging and export capabilities
  • USB port
    • 5V operating supply voltage
    • 200mA current rating
  • -10°C to +60°C operating temperature range
  • ESD sensitive
  • Stores the last 8192 CO2 values
  • LED indications
    • Green color indicates good indoor quality (CO2 concentrations between 400ppm to 1000ppm)
    • Yellow color represents intermediate indoor air quality (1001ppm to 1600ppm)
    • Red illumination indicates bad indoor air quality (>1600ppm)


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