Abstract
Many air pollutants are inhaled by human breathing, increasing the prevalence of respiratory disease and even mortality. With the recent COVID-19 issue, the number of air pollutants affecting humans is demands further investigation. However, there are not many adequate air measuring devices that can cover a variety of air pollutants. In this study, the developed air measurement system is able to measure sixteen air pollutants (PM10, PM2.5, PM4.0, PM1.0, CO2, CH4, temperature, humidity, VOCs, O2, H2S, NH3, SO2, CO, O3, NO2) in real time. The developed ‘multi-item air quality monitoring system’ can measure sixteen air pollutants in real time and transmit them to the server and the smartphone application at the same time. It was developed to reduce air pollutant damage to humans by emergency alerts using the smartphone application. The development system is composed of hardware development (measurement device) and software development (smartphone application, server). To verify the reliability of the developed equipment, a comparative test, temperature–humidity accuracy test, and operating temperature test were conducted. In the comparative test, difference ratios of ±5% for PM10, ±6% for PM2.5, ±4% for O3, ±5% for NO2, ±7% for CO, and ±7% for SO2 were found compared to the professional measuring devices. The temperature and humidity accuracy test result showed high reliability at ±1% and humidity ± 2%. The result of the operating temperature test showed that there was no problem in normal operation, However, further tests including the long-term comparative test and the closed chamber test will be carried out for all sensors. Additional work including a long-term test for more clear reliability of the device and closed chamber accuracy test for all 16-item sensors, data acquisition rate, and data transmit rate are in progress for commercializing the device.
Highlights
The risks posed by air pollution lead to side effects such as poor public health and increased mortality [1]
According to the World Health Organization (WHO), 4.2 million people die each year from outdoor air pollution and 3.8 million people die from indoor air pollution [2]
The developed device in this study consists of 16 air pollutant items including particulate matter (PM)(PM10, PM4.0, PM2.5, PM1.0), carbon dioxide (CO2), methane (CH4), temperature, humidity, volatile organic compounds (VOCs), oxygen (O2), hydrogen sulfide (H2S), ammonia (NH3), sulfur dioxide (SO2), carbon monoxide (CO), ozone (O3), and nitrogen dioxide (NO2) can be measured in real time
Summary
The risks posed by air pollution lead to side effects such as poor public health and increased mortality [1]. Rizzato et al (2020) concluded that particulate matter can have a devastating effect on vulnerable groups, including the elderly, pregnant women, and children, and it appears that it is closely related to mortality [9] Combustion gases such as gaseous carbon monoxide, carbon dioxide, NOx, SO2, and volatile organic compounds negatively affect the air quality and the human living environment [10]. The developed device in this study consists of 16 air pollutant items including PM(PM10, PM4.0, PM2.5, PM1.0), carbon dioxide (CO2), methane (CH4), temperature, humidity, volatile organic compounds (VOCs), oxygen (O2), hydrogen sulfide (H2S), ammonia (NH3), sulfur dioxide (SO2), carbon monoxide (CO), ozone (O3), and nitrogen dioxide (NO2) can be measured in real time. When the air pollution concentration is high, it is developed to warn of a risk to the user using an emergency alert
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