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Adafruit SCD-40 - Carbon Dioxide CO2, Temperature and Humidity Sensor Breakout

Adafruit Industries

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₹5,491.72 inc. GST
₹4,654.00 ex. GST
The SCD-40 is a photoacoustic sensor for measuring CO2, temperature, and humidity, offering accurate readings within a range of 400-2000 ppm. View full description
₹5,491.72 inc. GST
₹4,654.00 ex. GST
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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.

SCD-40 Specifications
  • 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.


Q: What is the measurement range of the SCD-40 for CO2?

A: The SCD-40 can measure CO2 concentrations in the range of 400 to 2,000 ppm (parts per million).

Q: How accurate is the SCD-40 in measuring CO2, temperature, and humidity?

A: The sensor boasts high accuracy, with CO2 readings within ±(30 ppm + 3%), temperature readings within ±0.2°C, and humidity readings within ±2% RH.

Q: What communication interface does the SCD-40 use?

A: The SCD-40 communicates via I2C, a common communication protocol used in many electronic devices.

Q: Is the SCD-40 suitable for outdoor use?

A: While the sensor can measure a wide range of environmental conditions, it's designed for indoor use. The optimal operating range is 0 to 50°C and 0 to 95% relative humidity.

Q: What applications can I use the SCD-40 for?

A: The SCD-40 is ideal for a variety of applications where accurate CO2, temperature, and humidity readings are needed. Some examples include:

  • Indoor air quality monitoring
  • HVAC systems
  • Smart home devices
  • Building automation
  • Agricultural and industrial monitoring

Technical Specifications

Adafruit Industries

Warranty Information

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.