Development of a PM2.5 Measurement Device Using Dust Sensors for Air Quality Monitoring

This research focuses on the development of an advanced air purifier system integrated with PM2.5 detection, UV-C light sterilization, and real-time monitoring through an IoT-based interface. The system utilizes a PM2.5 sensor to detect airborne particulate matter and activates the air purifier and UV-C light when the air quality exceeds predefined thresholds. Additionally, the system is designed to display PM2.5 values on an LCD screen and send notifications to a mobile application (LINE) to inform users about air quality conditions. Prototype testing was conducted in a 6 × 12-meter room using hairspray to simulate PM2.5 particles. The results showed that the air purifier activated successfully in response to elevated PM2.5 levels, displaying real-time data and sending alerts with messages such as “Danger” when air quality worsened. This study demonstrates the feasibility of combining IoT technology and real-time air quality monitoring to enhance environmental health management in indoor spaces. The proposed system provides a user-centric solution that not only improves air quality but also ensures immediate user awareness and intervention.