{"title":"Adafruit SCD-41 - True CO2 Temperature and Humidity Sensor","handle":"adafruit-scd-41-true-co2-temperature-and-humidity-sensor","url":"/products/adafruit-scd-41-true-co2-temperature-and-humidity-sensor","description":"The Adafruit SCD-41 is a photoacoustic true CO2 sensor that directly measures carbon dioxide concentration in ambient air with a wide measurement range of 400 to 5,000 ppm. It also includes integrated temperature and humidity sensing, providing comprehensive environmental data from a compact module.\n\nCompared to the lower-cost SCD-40 (400–2,000 ppm range), the SCD-41 offers wider range and better accuracy, making it ideal for industrial and scientific applications where CO2 levels can get very high. Data is read over I2C with Arduino and CircuitPython libraries available for quick setup.\n\nKey Features\n\n\nTrue CO2 Measurement – Photoacoustic sensing, not VOC-based estimation\n\nWide Measurement Range – 400 to 5,000 ppm CO2\n\nAccuracy – ±(40 ppm + 5% of reading)\n\nIntegrated Temperature & Humidity – Built-in environmental sensors for compensation and standalone readings\n\nI2C Interface – STEMMA QT / Qwiic connectors for solderless hookup and daisy-chaining\n\n3.3 V / 5 V Compatible – Onboard 3.3 V regulator provides clean, low-ripple power for accurate readings; level shifters for 5 V logic\n\nCompact Form Factor – Significantly smaller than NDIR-based CO2 sensors\n\n\nAlso Consider\n\n\nSCD-40 CO2 Sensor – Lower-cost version with 400–2,000 ppm range, ideal for standard air quality monitoring\n\nSCD-30 NDIR CO2 Sensor – Larger NDIR-based sensor with 400–10,000 ppm range and ±(30 ppm + 3%) accuracy\n\n\nIdeal For\n\nIndustrial CO2 monitoring where levels exceed 2,000 ppm\nScientific experiments and environmental research\nSmart building and HVAC systems\nIndoor air quality monitoring and ventilation studies\n\n\nPackage Contents\n\n1× Adafruit SCD-41 True CO2, Temperature & Humidity Sensor Breakout\n\n\n\nNote: STEMMA QT / Qwiic cable is not included. Use a compatible JST SH cable for solderless connection, or solder directly to the header pads.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":2951,"title":"Default Title","sku":"AF-5190","price":103.78,"on_sale":false,"in_stock":true,"available_quantity":51,"option1":"Default Title"}]}