Sensirion SCD40 CO2 level, humidity and temperature sensor

This sensor builds on the photoacoustic sensing principle.
Sensor board is equipped with an I2C interface.

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

Connection to LAN Controller v3.5 - firmware 1.50 or above is demand.
When connecting via the I2C interface, select the option with this sensor on the "I2C and 1Wire sensors" page. As a result, the readings from the sensor will be available in the fields T1, H1, CO2.