Smart CO₂ Sensor for Healthier Air and Automatic Ventilation
This room sensor is designed and optimized for full integration with the Smarwi system for automated ventilation and window control. It is equipped with a sensor that monitors the carbon dioxide (CO₂) concentration in the air. When preset limits are exceeded, the sensor automatically sends a signal to the Smarwi controller, which opens the window to improve ventilation. CO₂ is a reliable indicator of indoor air quality and room occupancy — high levels (above approx. 1200 ppm) can reduce concentration and cause fatigue, headaches, and discomfort.
Startup
When powered on, all indicator lights briefly flash. Within one minute, the sensor is ready for use, and after four days of continuous operation, it reaches its maximum accuracy.
Fault Indication
If all indicator lights remain permanently on, it indicates a sensor malfunction.
Relay Switching Level Adjustment
The relay can be easily configured using the rotary selector:
- Adjustment range: 0–100% corresponds to the selected CO₂ range (e.g., 0–2000 ppm)
- Activation: the relay switches on when CO₂ concentration exceeds the set level
- Deactivation: the relay switches off when the concentration drops below the set level minus hysteresis (5% of full range)
- Minimum delay: there is always at least a 2-minute interval between state changes
Example:
If the range is set to 0–2000 ppm and the selector to 50%, the switching point corresponds to 1000 ppm.
The relay activates when this level is exceeded and deactivates when CO₂ drops below 900 ppm (1000 ppm – 5% of range = 1000 – 100).
