CO2, Temp & Humidity Module | I2C Gas Sensor 2.4-5.5V

This SCD40/SCD41 module is a three-in-one sensor that measures CO2, temperature, and humidity. It sends all three readings over an I2C interface. This gives your project important environmental data from one small Sensirion SCD4x sensor board. It runs on 2.4-5.5V. Features and Benefits - Photoacoustic CO2 Sensing - Measures carbon dioxide from 400 to 5000 ppm. This helps you monitor indoor air quality accurately. - Integrated Temp & Humidity - It combines three environmental sensors on one board. This saves space and simplifies your design. - I2C Communication - It uses a standard two-wire interface. This makes it easy to connect to microcontrollers like an Arduino or Raspberry Pi. - SCD40 vs SCD41 Options - Pick the SCD40 for general use. Or choose the SCD41 for its smaller size and low power use, which is good for battery-powered devices. Applications - Building indoor air quality monitors for homes, offices, or schools. - Adding to HVAC systems for ventilation that adjusts to demand. - Making portable devices for environmental monitoring and data logging. What It Is This is an SCD41 Temp Module, a humidity sensor designed for air quality monitoring. It operates within a voltage range of 2.4-5.5V. The module is capable of detecting CO2, temperature, and humidity, making it a versatile component for various environmental sensing applications. Its communication interface is I2C, which is a common standard for connecting micro-controllers to peripheral devices. The sensor’s theory of operation is based on capacitance. Key Uses & Applications The SCD41 Temp Module is primarily used in air quality monitoring systems due to its ability to detect CO2, temperature, and humidity. Its I2C communication interface allows for easy integration with micro-controllers, enabling real-time data collection for environmental analysis. Specific applications include: - Indoor air quality assessment - HVAC system optimisation - Environmental control in greenhouses - Data logging for research projects How to Choose When selecting a humidity sensor, consider the specific parameters you need to measure. This SCD41 Temp Module detects CO2, temperature, and humidity. Check the operating voltage; this module requires 2.4-5.5V. The CO2 measurement range is 400-5000 ppm. Evaluate the required accuracy for your application; this sensor offers humidity accuracy of ±3 %RH and temperature accuracy of ±0.8 °C. Ensure compatibility with your existing micro-controller via the I2C interface. Grit / Spec Guide The SCD41 Temp Module offers specific performance characteristics relevant to its function as a working sensor. Its CO2 measurement range is 400-5000 ppm, and it provides a humidity accuracy of ±3 %RH. The temperature accuracy is ±0.8 °C. The operating voltage is specified at 2.4-5.5V. This sensor communicates via an I2C interface, which is a standard for digital data transfer. The underlying theory for its operation is a capacitance sensor. Care & Safety To ensure the longevity and accurate performance of your humidity sensor, handle it with care. Avoid exposing the module to extreme physical shock or moisture beyond its operational limits. While calibration instructions are not provided for this specific product, humidity sensors generally require periodic calibration to maintain accuracy. If you suspect a faulty sensor, cross-reference its readings with a known accurate device. Always ensure the operating voltage of 2.4-5.5V is adhered to to prevent damage.