Description
The 7Semi SCD40 CO₂, Temperature & Humidity Sensor Breakout is a compact, high-accuracy sensing module designed for indoor environmental and air-quality monitoring. It integrates a photoacoustic NDIR CO₂ sensor with built-in humidity and temperature measurement and communicates via I²C, making it suitable for smart-home, automation, HVAC, IoT and embedded systems requiring precise CO₂ data.
Technical Specifications:
- Target Gas: CO₂ (carbon dioxide)
- CO₂ Measurement Range: 0–40,000 ppm
- CO₂ Accuracy: ±(50 ppm + 5% of reading) within 400–2,000 ppm range
- Temperature Accuracy: ±0.8 °C typical
- Humidity Accuracy: ±6% RH typical
- CO₂ Response Time: ~60 seconds (τ63%)
- Humidity Response Time: ~90 seconds (τ63%)
- Supply Voltage: 2.4 V to 5.5 V
- Interface: I²C digital communication
- Operating Temperature: –10 °C to +60 °C
- Typical Current Consumption: ~15 mA active
- Sensor Package Size: ~10.1 × 10.1 × 6.5 mm
- Compatibility: 3.3 V logic microcontroller platforms
Features:
- Integrated CO₂, temperature and humidity measurement
- Photoacoustic NDIR sensing technology for high sensitivity
- Factory calibrated for accurate ready-to-use outputs
- I²C communication for easy integration
- Compact breakout module for prototyping
- Suitable for long-term indoor monitoring applications
Applications:
- Indoor air-quality monitoring and smart ventilation
- Smart-home automation and HVAC control
- IoT sensing nodes and remote environmental logging
- Educational, research and laboratory monitoring environments
- Portable CO₂, temperature and humidity monitoring devices