Air Quality Sensor CO2 Sensor 2.5V/3.3V/5V 20-Pin SMD EP T/R
The SCD41-D-R1 is a miniature photoacoustic carbon dioxide sensor module developed by Sensirion for high-accuracy environmental sensing applications. The device integrates a CO₂ sensing element, temperature sensor, humidity sensor, optical components, calibration memory, and digital signal processing into a compact surface-mount package suitable for embedded systems and portable electronics.
The sensor utilizes photoacoustic sensing technology to provide precise carbon dioxide concentration measurements while maintaining low power consumption and long-term stability. Integrated humidity and temperature sensing capabilities enable environmental compensation and simplify system integration by reducing the need for external sensors.
The SCD41 communicates through a standard I²C digital interface and supports automatic self-calibration functions for reliable long-term operation. Its compact footprint and low energy requirements make it suitable for battery-powered devices, smart building systems, HVAC equipment, indoor air quality monitoring systems, and IoT applications.
The module is factory calibrated and designed for continuous monitoring of indoor air quality conditions. The integrated architecture minimizes external component requirements while enabling accurate sensing performance across a wide operating range.
Key Features
Photoacoustic CO₂ sensing technology
Integrated temperature and humidity sensing
High accuracy carbon dioxide measurement
I²C digital communication interface
Low power consumption operation
Automatic self-calibration support
Compact surface-mount package
Factory calibrated output
Long-term measurement stability
Optimized for indoor air quality applications
Low-profile PCB mounting design
RoHS and halogen-free compliant
Electrical Characteristics
Low-voltage supply operation
Low average current consumption suitable for portable devices
Integrated digital signal processing
Non-volatile calibration memory
Standard I²C communication compatibility
Stable operation across industrial environmental conditions
Mechanical Characteristics
Compact SMD package for space-constrained applications
Surface-mount assembly compatible
Low-profile package structure
Integrated optical cavity and sensing chamber
Moisture-sensitive device requiring controlled handling during assembly
Functional Characteristics
Real-time carbon dioxide concentration monitoring
Simultaneous temperature and humidity measurement
Automatic environmental compensation
Continuous and periodic measurement modes
Fast startup and measurement response
Long operational lifetime with stable calibration
Optimized airflow design for accurate sensing
Suitable for continuous indoor environmental monitoring
Typical Applications
Indoor air quality monitoring systems
Smart thermostats and HVAC controllers
Building automation equipment
Demand-controlled ventilation systems
Portable environmental monitoring devices
Smart home and IoT products
Air purification systems
Occupancy and ventilation monitoring
Battery-powered sensing devices
Consumer and industrial environmental monitoring equipment