The 7Semi SCD40 CO₂, Temperature and Humidity Sensor Breakout Mini is a compact module for indoor air quality monitoring. It uses Sensirion’s PASens® photoacoustic technology to measure actual CO₂ levels. The sensor also measures temperature and relative humidity. Its I2C interface and Qwiic-compatible connector make integration simple. Automatic self-calibration supports stable long-term CO₂ monitoring when regularly exposed to fresh air. It is ideal for HVAC systems, classrooms, offices, greenhouses and IoT projects.
Features
• Measures CO₂, temperature and relative humidity
• Practical CO₂ measurement range: 400 ppm to 5,000 ppm
• CO₂ accuracy: ±(50 ppm + 5% of reading) from 400 ppm to 2,000 ppm
• I2C interface with a 2.54mm pin headder
• Automatic self-calibration and forced recalibration support
• Compatible with Arduino, ESP32, STM32
What’s Included
• 1x 7Semi SCD40 CO₂, Temperature and Humidity Sensor Breakout Mini
• 2.54mm pin headers
Resources
- SCD40 Datasheet
- User Guide, Sample Codes and other Documents
- 7Semi SCD40 Breakout 3D Step File
- 7Semi SCD40 DXF Files
- Sensirion I2C SCD4x Arduino Library (Library for the SCD4X sensor family by Sensirion Enables you to use the SCD40 and SCD41 sensors via I2C.)
- Category of product:
- Digital Enviroment sensors
- Communication interface:
- I2C (Default Address: 0x62)
- Supply voltage:
- 2.4V to 5.5V , Typical 3.3V or 5V
- Temprature sense range:
- -10C to +60C
- Accuracy:
- + /- 0.8C At 15C – 35C
- Humidity sensing range:
- 0 %RH – 100 %RH
- Accuracy (typ.):
- +/-6 % RH at 20 %RH – 65 %RH
- CO2 Sensing range:
- 400 – 40,000ppm
- Accuracy (typ):
- +/-(50 ppm + 5% of reading) at 400 ppm – 2,000ppm
- _3d_glb:
- https://7semi.com/content/3d-files/dfx_step/10109.glb
- Dimension:
- 20mm x 20mm 7.5mm
2 Reviews Hide Reviews Show Reviews
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Solid purchase
I bought this for a practical use case and it delivered. Pins, layout, and overall construction feel thought through. A good choice if you need this type of module.
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Highly recommend
Really happy with how this performed. It behaves consistently and feels dependable for regular work. A good choice if you need this type of module.
