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Adafruit SCD-30 NDIR CO2 Sensor

Adafruit SCD-30 NDIR CO2 Sensor

MPN: 4867
Adafruit Industries LLC
SCD-30, SHT31 Carbon Dioxide (CO2) Sensor Qwiic, STEMMA QT Platform Evaluation Expansion Board
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Overview

The Adafruit 4867 is an evaluation expansion board featuring the Sensirion SCD-30, a high-precision NDIR (non-dispersive infrared) carbon dioxide sensor. It provides accurate CO2 concentration readings alongside integrated temperature and humidity sensing, utilizing the SparkFun-compatible STEMMA QT/Qwiic connector system for solderless integration. This module is designed for indoor air quality monitoring where precise environmental data is required across a 3V to 5V power range.

Why Choose This Part

The SCD-30 uses dual-channel NDIR technology for long-term stability and automatic self-calibration. By including the STEMMA QT interface, engineers can prototype without soldering, while the onboard voltage regulation and level shifting ensure compatibility with both 3.3V and 5V logic systems.

Applications

Indoor Air Quality Monitoring
Measuring CO2 levels in offices and classrooms to manage ventilation and improve cognitive performance.
Greenhouse Automation
Tracking CO2, temperature, and humidity to optimize plant growth cycles in controlled environments.
HVAC Control Systems
Integrating with smart building controllers to trigger air exchange based on occupancy-driven CO2 spikes.

Getting Started

Connect the sensor to any I2C-enabled microcontroller using a Qwiic or STEMMA QT cable. Adafruit provides comprehensive libraries for Arduino and CircuitPython to retrieve CO2 ppm, temperature, and humidity data with minimal configuration.

Also Consider

Sensirion SCD30 Sensirion - The raw sensor component for integration directly onto a custom PCB without the breakout board.