Sensirion launches upgraded photoacoustic CO2 sensor

SCD43 is compatible with ASHRAE 62.1 Draft Addendum d and will be available to customers and via Sensirion’s distribution partners in summer of 2025.

SCD43 is a drop-in upgrade based on Sensirion's SCD4x platform. The sensor will offer customers a compact, high-accuracy CO2 sensor that fulfils the requirements of the most stringent building standards. This includes the requirements of the current draft of Addendum d to the American ASHRAE 62.1 standard for demand-controlled ventilation (DCV) systems.

SCD43 is the result of many years of experience with and continued research and development efforts into the SCD4x Photoacoustic NDIR CO2 sensor platform. Refined manufacturing and calibration processes enable a sensor specified to the industry's ‘best-in-class’ measurement accuracy of +-(30ppm + 3% m.v.).

Key features of SCD43:

• Comprehensive building standard compatibility
• ‘Best-in-class’ accuracy specification of
• ±(30ppm + 3% m.v.)
• Drop-in upgrade for SCD4x sensors
• Compact form factor of 10.1 x 10.1 x 6.5mm
• SMD solderable