Key facts
Product type Miniature CO2 sensor based on photoacoustic NDIR sensing principle | Measures CO2 concentration in ppm | Features Small form factor and on-chip signal compensation |
SCD4x CO2 sensor
Start testing the SCD4x CO2 sensor with the evaluation kit
Includes SCD41 development board, adapter cable and jumper wire set. Requires SEK-Sensorbridge.
Product catalogueStart prototyping
Find everything you need here.
The SCD4x is Sensirion’s next generation miniature CO2 sensor. This sensor builds on the photoacoustic NDIR sensing principle and Sensirion’s patented PASens® and CMOSens® technology to offer high accuracy at an unmatched price and smallest form factor. SMD assembly allows cost- and space-effective integration of the sensor combined with maximal freedom of design. On-chip signal compensation is realized with the built-in SHT4x humidity and temperature sensor. Tape and reel packaging make the SCD4x ideal for high-volume applications.
The SCD41 delivers several important features for applications in low power and indoor air quality, such as a specified CO2 accuracy range of up to 5’000 ppm, higher accuracy specifications and low power measurement modes.
Getting started with Arduino
Getting started with Raspberry Pi
Getting started with Python
Build a BLE Gadget with Arduino and SCD4x
| SCD4x embedded driver | Generic driver that can be ported to new microcontrollers with little effort |
| SCD4x Arduino driver | C++ Arduino library to work with SCD4x CO2 sensor via I2C |
| SCD4x Raspberry Pi driver | C Raspberry library to work with SCD4x CO2 sensor via I2C |
| Code samples Arduino | Standalone Arduino solutions demonstrating the communication with the sensor |
| SCD4x makecode | Makecode extension for the micro:bit platform |
Evaluate without writing code
In just three simple steps, you will be collecting valuable data without needing any coding or soldering skills.
How it works
- Order a SEK-SensorBridge via our distribution network
- Download the SEK-ControlCenter viewer software (available for Windows, Linux and MacOS)
- Connect the SCD41 development board to your computer by using a SEK-SensorBridge and start measuring
Find out what the evaluation kit holds
SCD41 development baord
- I2C interface
- VDD range: 2.4 to 5.5 V
- Peak current @ 3.3 V: 205 mA
- Peak current @ 5 V: 137 mA
Adapter cable to connect the SCD41 development board to SensorBridge
Jumper wire set to connect the SCD41 development board to embedded platform
Cable configuration:
- Green = SDA
- Red = VDD
- Yellow = SCL
- Black = GND
Discover featured SCD4x breakout boards
Explore our videos
Watch our videos to learn more about the SCD4x CO2 sensor.