Sensirion Carbon Dioxide Gas Sensor for CO Detectors , 2.4-5.5 V Supply, High Accuracy ±75 ppm, Compact 10.1 x SCD42-D-R2

The Sensirion SCD42-D-R2 Carbon Dioxide Gas Sensor for CO Detectors is a miniature, high-performance sensor designed for precise CO2 detection in various applications including environmental monitoring, HVAC systems, and indoor air quality control.

This sensor employs an advanced photoacoustic sensing principle combined with Sensirion’s patented PAsens® and CMOSens® technology to deliver a compact package measuring only 10.1 x 10.1 x 6.5 mm. The sensor module integrates an SHT4x humidity and temperature sensor on-chip for signal compensation, ensuring accurate CO2 concentration measurements.

Operating with a supply voltage range from 2.4 to 5.5 volts, the SCD42-D-R2 is suitable for external power supply configurations typically found in embedded environmental monitoring systems. It achieves a high accuracy of ±75 ppm across the typical indoor CO2 range of 400 to 1,000 ppm, enabling fine control of ventilation to maintain healthy, productive indoor environments.

The sensor's fast response time of 60 microseconds supports dynamic monitoring, while the large output concentration range from 0 up to 40,000 ppm allows deployment in residential, commercial, and industrial CO detection scenarios. Its small size and surface-mount assembly facilitate cost-effective and space-saving integration into CO detectors and smart ventilation devices.

This CO2 sensor is ideal for use in building automation, smart HVAC systems, and indoor air quality applications in industrial and commercial facilities. The built-in humidity and temperature compensation ensures reliable readings regardless of environmental fluctuations.

The sensor is reflow solderable, supporting modern manufacturing processes and enabling efficient PCB assembly. Designed and manufactured in Switzerland, this product reflects high quality and precision engineering. Additional accessories like Sensor Evaluation Kits and Sensor Bridges are available to support development and integration projects.

Choose the Sensirion SCD42-D-R2 sensor for efficient, accurate, and compact CO2 sensing technology in your next CO detector or ventilation control design.