SCD41 High Accuracy CO2 Temperature and Humidity Sensor Breakout I2C - 7Semi
SCD41 High Accuracy CO Sensor (I2C)
Overview
Advanced CO, temperature, and humidity sensor
Based on photoacoustic NDIR technology
High accuracy with low power consumption
Ideal for indoor air quality monitoring & IoT projects
Working Principle
Uses photoacoustic sensing (NDIR method)
Infrared light interacts with CO molecules
CO absorbs IR generates pressure waves
Internal sensor detects signal calculates CO concentration (ppm)
Key Specifications
CO Range: 400 5000 ppm
CO Accuracy: strong>Humidity Range: 0 95% RH
Interface: I2C (default address: 0x62)
Voltage: 2.4V 5.5V
Current Consumption: ~0.4 mA (low power)
Measurement Interval: ~5 seconds
Module Components
SCD41 sensor chip (Sensirion)
Onboard voltage regulator
I2C interface pins (SDA, SCL)
Power pins (VCC, GND)
Features
High accuracy CO sensing (NDIR)
Measures temperature + humidity simultaneously
Automatic self-calibration (ASC)
Compact and energy-efficient
Factory calibrated ready to use
ApplAC systems
IoT environmental monitoring
Greenhouses & agriculture
Smart classrooms & offices
Usage Tips
Allow warm-up time (~12 minutes) for stable readings
Ensure good airflow around the sensor
Avoid placing near direct breath or vents
Use proper I2C pull-up resistors if required
Advantages
Very high CO accuracy
Low power suitable for battery devices
Multi-parameter sensing (CO + Temp + Humidity)
Easy integration via I2C
Limitations
Higher cost compared to basic gas sensors (like MQ series)
Requisurement interval (~5s)
Pin Configuration (Typical)
VCC 3.3V / 5V
GND Ground
SDA I2C Data
SCL I2C Clock
Summary
Professional-grade air quality sensor
Accurate CO measurement using NDIR technology
Ideal for smart, reliable environmen