The SCD-40 breakout is perfect for indoor/outdoor air quality and CO2 measurements. It has a range of 400~2000 ppm with an accuracy of +-(50 ppm + 5% of reading). The SCD-40 is a photoacoustic true CO2 sensor that will tell you the CO2 PPM (parts-per-million) composition of ambient air. This sensor can run from 3.3 to 5V but it's more important for it to have a quiet power supply with low ripple, than any particular voltage. For that reason we've added a 3.3V regulator and level shifters: when connecting to a 5V microcontroller like an Arduino UNO the 5V supply is often shared with other electronic components that add noise. The onboard regulator will keep the voltage nice and quiet. For advanced hackers, they can cut/solder the back traces to change whether the regulator is enabled and what I2C logic level is desired.
Photoacoustic CO2 sensor technology
Integrated temperature and humidity sensor
Measurement range: 400 ppm – 2000 ppm
Accuracy: +-(50 ppm + 5 % of reading)
Current consumption: 17 mA (meas. rate = 5 s) / 0.5 mA (meas. rate = 5 min)
Fully calibrated and linearized
I2C digital interface address 0x61
- Dimensions: 25.5mm x 22.8mm x 7.7mm
- Weight: 2.8g
STEMMA QT / Qwiic 4-pin 1mm Pitch White Female Connector Cable 150mm Long - Both Side can be purchased seperately.
All the products supplied by Evelta are genuine and original. We offer 14 days replacement warranty in case of manufacturing defects. For more details, please visit our cancellation and returns page.