Description The Seeed Studio Grove CO2, Temperature and Humidity Sensor is a compact 3-in-1 environmental sensing module based on the Sensirion SCD41. It measures CO2 concentration, temperature and relative humidity through an I2C Grove interface, making it suitable for indoor air quality monitoring and smart ventilation prototypes. The SCD41 uses Sensirion PASens photoacoustic NDIR technology to support real-time CO2 measurement in a 400 to 5,000 ppm range, with accuracy up to +/- (40 ppm + 5%) under specified conditions. The integrated humidity and temperature sensing helps compensate the CO2 signal and provides additional environmental data from the same module. Features 3-in-1 monitoring for CO2, temperature and relative humidity Sensirion SCD41 sensor with PASens photoacoustic NDIR technology CO2 range from 400 to 5,000 ppm CO2 accuracy up to +/- (40 ppm + 5%) under specified conditions I2C communication through the Grove connector 3.3 V / 5 V input support for common development boards Compact module for space-constrained air-quality projects Applications Indoor air quality monitors Smart ventilation systems Environmental monitoring nodes Plant growth and greenhouse monitoring Arduino and Raspberry Pi weather-station projects Specifications Sensor Sensirion SCD41 Measured Parameters CO2, temperature, relative humidity Input Voltage 3.3 V / 5 V Interface I2C I2C Address 0x62 CO2 Measurement Range 400 to 5,000 ppm CO2 Accuracy +/- (40 ppm + 5%) Operating Range -10 to +60 deg C; 0 to 100% RH; 400 to 5,000 ppm SCD41 Sensor Size 10.1 x 10.1 x 6.5 mm Hardware Overview The module exposes power, ground, SDA and SCL through the Grove connector and labeled pads. It is designed for quick I2C connection to Grove-compatible controllers while keeping the sensing element compact for enclosure or ventilation-system integration. Part List Grove CO2, Temperature and Humidity Sensor (SCD41) 1 Resources Grove SCD41 CO2, temperature and humidity sensor wiki and getting started guide Sensirion SCD4x CO2 sensor datasheet Grove SCD41 schematic and PCB files Sensirion SCD4x STEP model file FAQ What does this Grove SCD41 module measure?It measures CO2 concentration, temperature and relative humidity in one compact Grove module.What interface does it use?It uses I2C through the Grove connector, with a default I2C address of 0x62.What CO2 range does it cover?The official specification lists a 400 to 5,000 ppm CO2 measurement range.Where is this sensor useful?It is useful for indoor air quality monitoring, smart ventilation, environmental sensing and Arduino or Raspberry Pi weather-station projects.
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