1.1.4. Carbon Dioxide Sensor (CO2)

ESDK CO2 board Introduction

The ESDK-CO2 board provides CO2 measuring capability to the ESDK platform, utilising a Sensirion SCD41 sensor. Schematic diagram

ESDK CO2 schematic diagram Theory of operation

This board features a single sensor, the Sensirion SCD41, that utilises NDIR technology to measure atmospheric CO2 levels with a specified range of 400-5000ppm and a quoted accuracy of ±40ppm + 5%. On the ESDK-CO2 board, an additional 3.3V regulator is present due to the high current peaks of up to 205mA that the sensor can require during measurements. Board layout

ESDK CO2 board layout