The SCD43 achieves a best-in-class accuracy of ±(30 ppm + 3% m.v.) and meets stringent building standards, including ANSI/ASHRAE 62.1-2022 Draft Addendum d, California Title 24, RESET® Grade B, and WELL v2. It features an extended range up to 5,000 ppm, single-shot operation, and integrated SHT4x humidity and temperature sensing for on-chip compensation. Built on Sensirion’s proven SCD4x platform, it uses photoacoustic NDIR technology in a compact, fully encapsulated 10.1 × 10.1 × 6.5 mm³ package, SMD solderable and tape-and-reel ready.
The sensor is robust, long-lasting, and easy to integrate, with on-chip self-calibration, long-term drift compensation, multiple power modes, and a digital I²C interface. Its small footprint and reliable performance make it suitable for a variety of designs and environments.
The SCD43 is particularly suited for commercial or residential HVAC systems, wall-mounted thermostats, air purifiers, and indoor air quality monitors, providing accurate CO₂ measurements to maintain energy efficiency, comfort, and healthy indoor environments.
Key features:
- Photoacoustic NDIR sensing technology
- Small footprint of 10.1 × 10.1 × 6.5 mm3
- Fully encapsulated sensor package
- SMD solderable, tape & reel packaging
- On-chip compensation and self-calibration
- Supply voltage range of 2.4–5.5 V
- Multiple operation and reduced power modes
- Digital I2C interface
