The MH-411D carbon dioxide gas sensor is a general-purpose intelligent infrared gas sensor. It utilizes the principle of non-dispersive infrared (NDIR) to detect CO2 in the air. This sensor is oxygen-independent, stable in performance, and has a long lifespan. It features built-in temperature compensation. This compact, high-performance sensor is manufactured by tightly integrating mature infrared absorption gas detection technology with micro-machining and sophisticated circuit design.