The YR-PF110 portable dust concentration measuring instrument adopts the principle of laser scattering and can simultaneously detect three types of dust concentrations: TSP, PM10, and PM2.5. The instrument is equipped with a 2.8-inch high-definition screen, supporting sound and light vibration alarm, data storage, and 4G upload. It is portable, sensitive, and easy to operate, suitable for measurement in situations without external power supply. It can be widely applied in various public places and fields such as electronics, optics, food, etc.