Adafruit SCD-41 - True CO2 Temperature and Humidity Sensor

The SCD-41 is a precise photoacoustic 'true' CO2 sensor that accurately measures CO2 PPM (parts-per-million) in ambient air, essential for maintaining a balanced ecosystem. Perfect for environmental studies, scientific experiments, and ventilation assessments, the sensor relies on an innovative measurement technique for enhanced reliability.

Unlike approximations from VOC gas concentration, this sensor directly gauges CO2 levels, providing reliable data. It offers compatibility with most microcontrollers via I2C communication, supported by Arduino and Python/CircuitPython code for straightforward integration into diverse projects.

Choose from two variants: the SCD-40, ideal for everyday air quality analysis with a range of 400-2000 ppm, or the SCD-41, suitable for specialized industrial applications, covering 400-5000 ppm with heightened accuracy. Both variants deliver ±(50 ppm + 5% of reading) or ±(40 ppm + 5% of reading) accuracy respectively.

The sensor is integrated onto a custom PCB in the STEMMA QT form factor, compatible with SparkFun Qwiic I2C connectors, facilitating solderless connections to your development board or chaining with additional sensors.

Operating from 3.3 to 5V, the device includes a 3.3V regulator and level shifters for stable voltage, minimizing interference from other components. Advanced users can customize the setup further via soldering modifications for optimal performance.