Gravity I2C SCD41 Infrared CO2 Sensor

The DFRobot Gravity CO2 sensor carries the Sensirion SCD41 and measures the CO2 concentration directly using the photoacoustic NDIR principle, plus temperature and humidity. The measuring range extends from 400 to 5000 ppm with an accuracy of ±(40 ppm + 5 % of reading). The sensor is read via I2C, runs on 3.3 V to 5 V and draws less than 4 mA on average. Besides continuous measurement, a single-shot measurement followed by sleep mode is possible.

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Dupont Cables M-M 10cm 20 Pieces

Features:

• Sensirion SCD41, photoacoustic NDIR principle
• CO2, temperature and humidity in one sensor
• CO2 400 to 5000 ppm, ±(40 ppm + 5 % of reading)
• Continuous measurement or single-shot measurement with sleep mode
• I2C, address 0x62
• Average current below 4 mA
• 4-pin Gravity connector, operation at 3.3 V and 5 V
• Library for Arduino and Raspberry Pi

Application Examples:

• CO2 monitoring in homes, offices and classrooms
• Ventilation control based on CO2 content
• Greenhouses
• Battery-powered data loggers

Documentation:

• DFRobot Wiki SEN0536
• Library DFRobot_SCD4X on GitHub
• Schematic (PDF)
• Dimension drawing (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0536
• Sensor: Sensirion SCD41, photoacoustic NDIR
• Operating voltage: 3.3 V to 5 V
• Average operating current: below 4 mA
• Interface: I2C, address 0x62
• CO2: 400 to 5000 ppm, ±(40 ppm + 5 % of reading), response time 60 s
• Humidity: 0 to 95 % RH, typically ±6 % RH, response time 120 s
• Temperature: -10 °C to 60 °C, typically ±0.8 °C, response time 120 s
• Measuring interval: 5 s, in low-power mode about 30 s
• Sleep current: about 1 µA
• Connection: 4-pin Gravity (SDA, SCL, GND, VCC)
• Dimensions: 32 × 27 × 8 mm
• Gross weight: 14 g

Scope of Delivery:

• 1× Gravity SCD41 CO2 sensor
• 1× 4-pin Gravity cable (PH2.0 to Dupont female)