Multi-pixel gas sensor for indoor air quality applications. I 2 C interface with TVOC and CO 2 eq output signals. The SGP40 is a digital multi-pixel gas sensor designed for easy integration into air purifier, demand-controlled ventilation, and IoT applications. CMOSens technology offers a complete sensor system on a single chip featuring a digital I 2 C interface, a temperature controlled micro-type hotplate, and two preprocessed indoor air quality signals. As the first metal-oxide gas sensor featuring multiple sensing elements on one chip, the SGP40 provides more detailed information about the air quality. The sensing elements features an unmatched robustness against contaminating gases present in real-world applications enabling a unique long-term stability and low drift. Please note:the physical Some color difference or difference, does not affect the use, please do not mind, thank you! Colour:Blue Material:Plastic Package Contents: 2 * Carbon Dioxide Sensor 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.