Apollo - SCD40 Sensirion CO2 Sensor

Miniaturized CO2 sensor

CO2 is a key indicator of indoor air quality (IAQ), as high levels compromise cognitive performance and human well-being. The SCD4x enables intelligent ventilation systems to regulate ventilation in the most energy-efficient and human-friendly manner.

The miniaturized CO₂ sensors SCD4x from Sensirion are CO₂ and RH/T sensors that fit into a space of just one cubic centimeter. These CO₂ sensors offer a supply voltage range of 2.4 V to 5.5 V, a fully calibrated digital I²C output, and a nominal accuracy of ± (30 ppm + 3 % MV). Compared to the SCD30, the SCD4x footprint has been miniaturized by a factor of 5, resulting in dimensions of only 10.1 mm x 10.1 mm x 6.5 mm. By using the photoacoustic NDIR detection principle, the dimensions of the optical cavity are significantly reduced without compromising sensor performance. CO2 sensor compliant with RESET, WELL, Title 24, ASHRAE 62.1 construction standards. The SCD4x series includes a high-quality temperature and humidity sensor that provides two additional sensor outputs. The miniaturized CO₂ sensors SCD4x from Sensirion are ideal for detection markets such as IoT, automotive, HVAC, home appliances, and consumer goods.

Compatibility

This module includes a mezzanine connector compatible with MSR-1 Revision 9 or higher and Air-1 Revision 3 or higher. The revision number is printed on the back of the Apollo boards next to the logo; please check that the board is of the correct version before placing an order.

Technical Specifications

• Small size 10.1 mm x 10.1 mm x 6.5 mm
• Surface mount
• On-chip HR and T compensation
• Mechanical robustness
• Reflow soldering
• Supply voltage range from 2.4 V to 5.5 V
• Fully calibrated digital I²C output
• Output range 0 ppm to 40,000 ppm
• No external circuitry required, no energy loss
• Accurate measurements immediately after assembly
• Accuracy ±(50 ppm + 5 % of the reading)
• Specified range from 400 ppm to 2,000 ppm