Sensirion SCD40 CO2 level, humidity and temperature sensor - ARDUINO version

The Sensirion SCD40 sensor determines the level of carbon dioxide according to the newly developed photoacoustic technology.
The board with the sensor is adapted for connection to the I2C interface and has resistors and jumpers to enable the pull-up of the bus to 3.3V

Technical parameters:

• Supply voltage DC: 2.4÷5.5V (typical is 3,3V or 5V)
• Peak supply current: 175mA
• maximal I2C wire connection: 0.5m
• maximal 1 wire connection: 5m for one sensor, 1m each for 3 sensors
• tile dimensions: 20 x 50 mm

CO₂ output range: 0÷40000ppm

• measurement accuracy: 400ppm ÷ 2000ppm ±(50 ppm + 5% of reading)
• Repeatability: ±10ppm
• Response time: 60s

Humidity measurement range: 0 ÷ 100 %RH

• Accuracy (typ. +15°C ÷ +35 °C, 20 ÷ 65 %RH): ±6 %RH
• Accuracy (-10 ÷ +60°C, 0 ÷ 100 %RH): ±9 %RH
• Repeatability: ±0.4 %RH
• Response time: 90s

Temperature measurement range: -10 ÷ +60°C

• Accuracy (typ. +15 ÷ +35°C): ±0.8°C
• Accuracy (-10 ÷ +60°C): ±1.5°C
• Repeatability: ±0.1°C
• Response: 120s