Sensirion SCD4x Miniaturized CO2 Sensors

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

Features

10.1mm x 10.1mm x 6.5mm small form factor
Surface mount
On-chip RH and T compensation
Mechanically robust
Reflow solderable

2.4V to 5.5V supply voltage range
Fully calibrated digital I²C output
0ppm to 40,000ppm output range
No external circuitry required, no energy loss
Accurate readings right after assembly

Applications

Demand controlled ventilation
Indoor air quality monitoring
CO₂ ventilation alarms

IoT/smart homes
Agriculture/green housing
Industrial

Specifications

SCD41
- ±(40ppm +5% of reading) accuracy
- 400ppm to 5000ppm specified range
- Low-power single shot
- Meets Californian Building Energy Efficiency standard – Title 24 certification

SCD40
- ±(50ppm +5% of reading) accuracy
- 400ppm to 2000ppm specified range

Videos

SCD4x Product Family Upgrade

Chart - Sensirion SCD4x Miniaturized CO2 Sensors

Sensor Placement

Infographic - Sensirion SCD4x Miniaturized CO2 Sensors

Reset / Well Compliant Sensor

Resources

Testing Guide
Sensirion CO2 Sensors SCD40 Flyer

Design-In Guide
Handling Instructions