10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
The Development of Low-Cost Particle Sensor for Air Quqlity Monitoring
JINHONG AHN, Innociple Co., Ltd.
Abstract Number: 735 Working Group: Instrumentation
Abstract Recently, there has been a widely increasing in the use of low-cost particle sensors for air quality monitor. The most of applications are portable PM monitor and air purifier system. In present, the kind of low-cost PM sensors are IRED type and Laser light scattering type. Several researchers have tested these sensors in the laboratory or ambient environment. In these studies, the sensor generally meets to well at high PM concentrations. But in low PM concentration, these sensors show an underestimated than reference device. In this study, we have developed new low cost PM sensor applied to single particle counting method. Our PM sensor composed of laser diode, focus plano-convex lens, focus mirror and photodiode. This system is similar to general particle counter. So our PM sensor can be measuring particle size and particle counts simultaneously. Thus PM concentrations have made conversion using this information. Our PM sensor can be measure over the 0.5 µm and classify 4 channels. We tested PM sensors against a number of particle mass and number measuring instruments with KCl particles in experimental duct system and ambient aerosols to verify performance. With KCl particles, our sensor meets to very well in the range of 10 to 300 µg/m3 of PM10 and PM2.5 concentration. The response to KCl particle was also good, with R2 values in the range of 0.97-0.99.