Improved Design of a Low-Cost, Mobile and Modular Air Pollution Monitoring System

Air pollution is a global problem and it affects the health of millions of people every day, not to mention the damage it also causes to the environment. It is still an issue that does not reach all world territories. In many countries, monitoring air quality is regulated, standardized, and mandatory. However, it remains underdeveloped, leaving countries with insufficient monitoring of pollution levels. Our work aims to develop a low-cost mobile air pollution monitoring system. The system was designed to monitor environmental factors such as: temperature and relative humidity; as well as common pollutants $\text{CO}, \text{NO}_{2}$, $\text{SO}_{2}$ and $\mathrm{O}_{3}$. The first phase of our project led to the development of a prototype deployed at a fixed site to collect air pollutant data, store, and analyze it. The results qualitatively demonstrated the good performance of the sensors and of the overall system, guiding us in identifying additional features and improvements needed to enhance its functionality. These results contributed to a modular, compact, and geo-referenced monitoring system.