SCD40 CO2 Temperature and Humidity sensor
The SCD40 CO₂ breakout board by Sensirion provides high-accuracy, reliable measurement of carbon dioxide concentration, along with temperature and humidity sensing, in a compact form factor. Designed for precise air quality monitoring, it is ideal for use in smart homes, greenhouses, HVAC systems, and industrial environments. With its I²C interface, the module integrates easily with microcontroller-based systems, and its low power consumption supports energy-efficient designs. The robust and compact construction ensures long-term stability and performance, even under changing environmental conditions.
Key Features
- High-accuracy COâ‚‚ measurement (400 ppm to 5000 ppm)
- Built-in temperature and humidity sensors for comprehensive environmental monitoring
- Communicates via standard I²C interface (SCL, SDA)
- Low power consumption for energy-sensitive applications
- Compact and lightweight: ideal for tight spaces
- Stable and reliable operation in varying conditions
- Suitable for both residential and industrial environments
Technical Specifications
Sensor Model: SCD40
- CO₂ Measurement Range: 400 – 5000 ppm
- CO₂ Accuracy: ± (50 ppm + 5% of measured value)
- Relative Humidity Range: 0% – 95% RH
- Humidity Accuracy: ±6% RH
- Temperature & Humidity Sensor: Integrated
- Data Interface: I²C
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Pin Definitions:
- GND: Ground
- VDD: Power input (3.3V to 5.0V)
- SCL: I²C clock
- SDA: I²C data
- Power Supply: 3.3V – 5.0V
- Dimensions: 22mm × 10mm × 5mm
- Weight: 3g
Applications
- Indoor air quality monitoring in homes and offices
- Smart home integration and automation systems
- COâ‚‚ optimization in greenhouses
- Industrial HVAC and ventilation control
- Air quality regulation in classrooms and public buildings
- IoT-based environmental sensing systems