The SDXC CO2 sensor and switch controller with M‑Bus RTU is designed to monitor and control CO2 levels in ventilation and building automation systems. It integrates seamlessly with M‑Bus networks, enabling efficient communication and system management. Constructed for reliable and precise operation, the controller helps maintain optimal indoor air quality while supporting energy-efficient ventilation performance. Suitable for both commercial and residential applications, it provides a durable and professional solution for CO2 monitoring and automated system control.