{"title":"CO₂ Humidity and Temperature Sensor - SCD41 (Qwiic)","handle":"co-humidity-and-temperature-sensor-scd41-qwiic-1","url":"/products/co-humidity-and-temperature-sensor-scd41-qwiic-1","description":"A high-quality photoacoustic CO₂ sensor breakout based on the Sensirion SCD41, with integrated temperature and humidity sensing. The SCD41 detects CO₂ levels from 0 to 40,000 ppm with high accuracy over the 400–5,000 ppm range (±40 ppm + 5%). It also accepts ambient pressure readings for improved accuracy.\n\nFeatures a Qwiic connector for plug-and-play I²C connectivity with no soldering required. An Arduino library is available for easy reading of CO₂, humidity, and temperature values.\n\nKey Features\n\n\nSensirion SCD41 – Photoacoustic CO₂ sensor with high accuracy\n\nCO₂ Range: 0–40,000 ppm (±40 ppm + 5% over 400–5,000 ppm)\n\nIntegrated Temperature & Humidity – Three measurements from one sensor\n\nAmbient Pressure Compensation – Accepts external pressure readings for improved accuracy\n\nQwiic Connector – Plug-and-play I²C, no soldering required\n\nAutomatic Self-Calibration – Calibrates over time with exposure to fresh air\n\n\n\nTip: The SCD41 has an automatic self-calibration routine. Sensirion recommends 7 days of continuous readings with at least 1 hour per day of fresh air exposure for self-calibration to complete.\n\n\nIdeal For\n\nIndoor air quality monitoring\nHVAC and ventilation control\nEnvironmental sensing projects\nSmart home and IoT applications\n\n\nPackage Contents\n\n1× SCD41 CO₂ Humidity and Temperature Sensor (Qwiic)\n\n\nResources\n\nSCD41 Datasheet (PDF)\nSchematic (PDF)\nEagle Files (ZIP)\nArduino Library (GitHub)\nHardware Repository (GitHub)\n","vendor":"SparkFun","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":3133,"title":"Default Title","sku":"SF-SPX-18366","mpn":"","price":161.65,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":1,"option1":"Default Title","option2":"","option3":""}]}