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Sensirion SCD43 Photoacoustic NDIR CO2 Sensor

Sensirion SCD43 Photoacoustic NDIR CO2 Sensor is a drop-in upgrade based on Sensirion's SCD4x platform and is compatible with ASHRAE 62.1 Draft Addendum d for demand-controlled ventilation (DCV) systems. This compact, high-accuracy air quality sensor is designed to fulfill stringent building standards and offers a superior accuracy specification of ±(30ppm + 3% m.v.). The sensor features an extended specified range up to 5Kppm and a single-shot operation mode. The sensor builds on the photoacoustic NDIR sensing principle and Sensirion's patented PASens® and CMOSens® technology to offer high accuracy and small form factor. SMD assembly allows cost- and space-effective integration of the sensor combined with maximal freedom of design.

Sensirion SCD43 Photoacoustic NDIR CO2 Sensor is constructed using refined manufacturing and calibration processes in a surface-mount form factor with 10.1mm x 10.1mm x 6.5mm dimensions. On-chip signal compensation is realized with the built-in SHT4x humidity and temperature sensor. Typical applications indoor air quality monitoring, industrial processes, and HVAC.

Features

  • Comprehensive building standard compatibility, including ASHRAE 62.1 Draft Addendum d
  • Superior accuracy specification of ±(30ppm + 3% m.v.)
  • Drop-in upgrade for SCD4x sensors
  • Compact form factor of 10.1mm x 10.1mm x 6.5mm
  • SMD solderable
  • 60s response time (τ63%)
  • Refined manufacturing and calibration processes

Applications

  • Indoor air quality monitoring
  • Industrial processes
  • HVAC

Specifications

  • CO2
    • 0ppm to 40Kppm output range
    • 400ppm to 5Kppm specified measurement range
    • ±(30ppm + 3% m.v.) accuracy
    • 60s response time (τ63%)
  • Humidity
    • 6% relative humidity (RH) typical accuracy
    • 0% to 95% RH operating range
    • 90s response time (τ63%)
    • Factory calibration
  • Temperature
    • 0.8°C typical accuracy
    • 120s response time (τ63%)
  • 2.4V to 5.5V supply range
  • 15mA average supply current, 205mA maximum
  • -10°C to +60°C operating temperature range

Application Examples

Infographic - Sensirion SCD43 Photoacoustic NDIR CO2 Sensor

Dimensions

Chart - Sensirion SCD43 Photoacoustic NDIR CO2 Sensor

Resources

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Kit

Sensirion SCD43 CO2 Sensor Evaluation Kit

Kit features an SCD43 integrated on a board, allowing quick testing for different applications.

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Publicerad: 2025-02-10 | Uppdaterad: 2025-09-18