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