DEVELOPMENT OF PORTABLE AIR POLLUTION ALARMING DEVICE

This study attempts to develop an air pollution alarming device that can simultaneously detect and warn against harmful substances by replacing oxygen sensors with volatile organic compound (VOC) sensors that can detect pollution in real time. A prototype is designed using a 3D printer and Arduino platform with an applied algorithm that sounds an alarm when dangerous levels are reached. A small closed chamber is manufactured in the laboratory to perform this function, and VOC and oxygen sensors are installed to perform the combustion experiment. The experimental results establish that oxygen is consistently reduced from 21% to 17% whereas the VOCs increase. The eCO2 concentration increases from 400 to 43,069 ppm, and the total VOC (TVOC) increases from 0 to 37,194 ppb. At an O2 level of 17.6%, representing a lack of O2, the points of overlap for the TVOC, eCO2, and O2 curves correspond to eCO2 and TVOC concentrations of 12,289 and 1,542 ppb, respectively. The concentrations of O2 and VOCs are observed to be inversely proportional, and the intersections of the risk level curves for VOCs and O2 are determined.