Carbon dioxide is a critical indicator of indoor air quality that can affect human cognitive abilities and well-being,The SCD40 is next-generation miniaturized CO2 sensors, offering high precision and cost-effectiveness. These modules feature a 2.54mm pitch pin header interface for power supply and communication connections, On-chip temperature and humidity compensation is achieved through built-in sensors for humidity and temperature measurement. The SCD40 can intelligently regulate indoor ventilation systems based on c02 concentration levels, thereby maintaining a healthy and efficient environment with low C02 levels over time, This makes the SCD40 ideal for applications focused on improving indoor air quality. Characteristics: SCD40 Reference Accuracy and Range: 400-2000 ppm Supply Voltage Range: 2.4-5.5 V High Accuracy: (40 ppm + 5%) Digital Interface:I2C Integrated Temperature and Humidity Sensor Low Power Consumption Pin Definitions: GND:Ground input terminal : Positive power supply input terminal SCL: I2C clock terminal SDA:I2C data terminal Color: Material:PCB Package Contents: 2 * Gas sensor Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.