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SCD43 - Overview

CO2, Temperature & Humidity Sensor SCD43​

The SCD43 is a CO2, temperature, and humidity sensor by Sensirion, based on photoacoustic NDIR (Non-Dispersive Infrared) sensing. It measures all three values over I2C (fixed address 0x62) and comes on a breakout board with two Qwiic (formerly easyC) connectors for easy daisy-chaining.

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Key features​

  • CO2 measurement range: 400 - 5,000 ppm
  • CO2 accuracy: ±(30 ppm + 3% of reading)
  • Temperature range: -10°C to 60°C
  • Humidity range: 0% - 95% RH
  • Operating voltage: 2.4V - 5.5V (works directly with 3.3V or 5V boards)
  • Communication: I2C (address: 0x62)
  • Connector: 2 × Qwiic (formerly easyC)
  • Dimensions: 22 × 22 mm (0.9 × 0.9 inch)

You may also need​

Qwiic cable

Qwiic cable

Qwiic (formerly easyC) compatible cables with connectors on both ends, available in various lengths.