The SCD40 CO2, Temperature and Humidity Sensor Breakout Board is engineered for professionals and developers seeking reliable, real-time atmospheric monitoring in a small, efficient package. Leveraging Sensirion’s photoacoustic sensing technology, this sensor ensures superior accuracy within the critical 400–2000 ppm CO2 range, making it a trusted choice for applications requiring precision air quality data. With its fully integrated temperature and humidity sensors, it offers complete environmental insights in a single, compact unit.
Ideal for integration into IoT devices, HVAC systems, smart homes, air quality monitoring stations, and energy-efficient building controls, the SCD40 breakout board supports a wide detection range up to 40000 ppm. Its I2C interface guarantees simple integration with various microcontrollers, while ultra-low power consumption (as low as 0.5 mA) ensures it fits seamlessly into battery-powered and remote systems. Built with longevity in mind, the sensor maintains consistent performance for years with minimal recalibration needs.
Key Features
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Advanced Photoacoustic CO2 Sensing: Utilises state-of-the-art photoacoustic infrared technology for highly accurate and stable CO2 measurement.
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Integrated Environmental Sensors: Measures temperature and humidity alongside CO2 levels for a comprehensive atmospheric profile.
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Wide Measurement Range: Accurately detects CO2 concentrations from 400 ppm up to 40000 ppm; highly precise in the 400–2000 ppm band.
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Exceptional Accuracy: ±(40 ppm + 5%) ensures dependable readings for mission-critical applications.
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Energy Efficient Design: Consumes only 17 mA at 5-second intervals or just 0.5 mA at 5-minute intervals, ideal for low-power applications.
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Fully Calibrated and Ready-to-Use: No additional calibration required, enabling immediate integration and deployment.
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I2C Communication Protocol: Seamless connectivity with Arduino, Raspberry Pi, ESP32, STM32, and other development boards.
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Compact and Durable Build: Suitable for integration into space-constrained or embedded systems with long operational life.
- User Guide and Sample Code etc.
- Sensirion I2C SCD4x Arduino Library (Library for the SCD4X sensor family by Sensirion Enables you to use the SCD40 and SCD41 sensors via I2C.)
SCD40 carbon dioxide sensor Breakout I2C Arduino Connections
- Target Gas:
- CO2 carbon dioxide
- Measurement Range:
- 400 ppm – 2000 ppm
- Accuracy:
- +-(50 ppm + 5 % of reading)
- Interface:
- I2C
- Other Sensing:
- Integrated temperature and humidity sensor
- Operating Voltage:
- 3.3V