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

• COâ‚‚ Measurement Range: 400 – 5000 ppm
• COâ‚‚ Accuracy: ± (50 ppm + 5% of measured value)
• Relative Humidity Range: 0% – 95% RH
• Humidity Accuracy: ±6% RH
• Temperature & Humidity Sensor: Integrated
• Data Interface: I²C
• 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