A high-quality photoacoustic CO₂ sensor breakout based on the Sensirion SCD41, with integrated temperature and humidity sensing. The SCD41 detects CO₂ levels from 0 to 40,000 ppm with high accuracy over the 400–5,000 ppm range (±40 ppm + 5%). It also accepts ambient pressure readings for improved accuracy.

Features a Qwiic connector for plug-and-play I²C connectivity with no soldering required. An Arduino library is available for easy reading of CO₂, humidity, and temperature values.

Key Features

• Sensirion SCD41 – Photoacoustic CO₂ sensor with high accuracy
• CO₂ Range: 0–40,000 ppm (±40 ppm + 5% over 400–5,000 ppm)
• Integrated Temperature & Humidity – Three measurements from one sensor
• Ambient Pressure Compensation – Accepts external pressure readings for improved accuracy
• Qwiic Connector – Plug-and-play I²C, no soldering required
• Automatic Self-Calibration – Calibrates over time with exposure to fresh air

Ideal For

• Indoor air quality monitoring
• HVAC and ventilation control
• Environmental sensing projects
• Smart home and IoT applications

Package Contents

• 1× SCD41 CO₂ Humidity and Temperature Sensor (Qwiic)

Resources

• SCD41 Datasheet (PDF)
• Schematic (PDF)
• Eagle Files (ZIP)
• Arduino Library (GitHub)
• Hardware Repository (GitHub)