The 7Semi SCD43 CO₂, Temperature and Humidity Sensor Breakout is a compact sensor module for accurate indoor air-quality monitoring. It uses Sensirion’s PASens photoacoustic NDIR technology to directly measure CO₂ levels from 400 ppm to 5,000 ppm, with an accuracy of ±(30 ppm + 3% of the reading). It also measures temperature and relative humidity, making it ideal for HVAC systems, smart buildings, indoor air-quality monitors and IoT applications.
Important power note: When powering the board through VCC, the 3V3 pin acts as the regulated 3.3V output with 200mA current rating . Alternatively, the board can be powered directly through the 3V3 pin. Do not apply power to both VCC and 3V3 at the same time.
Key Features
- Measures CO₂, temperature and relative humidity
- CO₂ measurement range: 400 ppm to 5,000 ppm
- CO₂ accuracy: ±(30 ppm + 3% of measured value)
- PASens® photoacoustic NDIR technology for true CO₂ measurement
- Supports automatic self-calibration (ASC)
- Supports forced recalibration (FRC)
- Supports single-shot measurement
- Easy integration through I²C interface
- Compact breakout board for embedded and IoT applications
Calibration Certificate
A calibration certificate is available for the sensor. To request the certificate, please email us the sensor serial number, and we will share the corresponding calibration certificate.
Items Included
- 1 × 7Semi SCD43 Breakout Board (ES-12295)
- 1 × Pin Header
Note: The Qwiic cable is not included and must be purchased separately.
Resources
- Category of product:
- Digital Enviroment sensor
- Supply voltage required (VCC):
- 3.6V to 5.5V
- Communication Interface:
- I2C
- Operating Temperature:
- -10C to +60C
- Temperature Accuracy:
- ±0.8°C typical from 15°C to 35°C
- _3d_glb:
- https://7semi.com/content/3d-files/dfx_step/10172.glb
- Operating Humidity:
- 0%RH to 95%RH, non-condensing
- Humidity Accuracy:
- ±6%RH typical
- CO2 Measurement output Range:
- 0 – 40’000 ppm
- CO2 Measurement Accuracy:
- ±(30 ppm + 3% of reading) at 400 ppm – 5’000 ppm
- Dimension:
- 20mm x 20mm x 7.5mm
