Proposta de um protótipo de sensor de baixo custo para medição de ozônio - O3

Abstract

Ozone (O3) is currently one of the indicators of air quality in national legislation. It is a component that can pose serious risks to human health when there is prolonged exposure in inadequate concentrations. This work takes the approach of developing a low-cost prototype sensor for measuring ozone. The research involves the integration of technologies such as Arduino and sensors such as the MQ-131 and DHT22 to make up the equipment. The objectives of the study were established, which aim to create a portable device capable of collecting and storing ozone concentration data. The justification for the project highlights the importance of continuous monitoring of air quality for the health of the population and the environment, emphasizing the need for affordable and effective solutions. Components such as ozone meters, display monitors, storage modules and temperature and humidity sensors were used. The integration of these elements enabled the creation of a functional prototype capable of collecting data autonomously. The results obtained demonstrate the effectiveness of the prototype, which proved capable of monitoring ozone concentrations satisfactorily. The comparative analysis between the prototype's sensors and commercial equipment such as the Aeroqual 200 shows the quality of the sensor developed, with an R² of 0.8 for adherence to some of the calibration equations. Another highlight is the average cost of the prototype, which is approximately 12 times lower than equivalent equipment on the market. Finally, it can be concluded that the approach adopted to develop the prototype ozone sensor has produced satisfactory results. The integration of innovative technologies and the application of scientific concepts contribute to promoting public health, preserving the environment and advancing the field of environmental sensing.