High density sensor network inside bus terminus to monitor air quality for hotspot identification

The air quality inside the semi-enclosed bus terminus has been a great challenge in urban settings. Sapiens air sensors (NAS-AF300) is used in Hong Kong by government agencies to closely monitor the air pollutants of NO, NO2, CO, CO2 and PM2.5 from traffic emission inside the bus terminus. The high-density network creates a real time air pollution map to identify the hotspot of air pollution and diagnose the critical causes of the air pollution issues. It also helps to evaluate the effectiveness of the mitigation measures.