The stylish design of HPC301 features easy-clean stainless enclosure particularly suitable in ultra clean environment. Because of its low-cost, versatility, and affordability, it can also be used for indoor/outdoor air quality (IAQ) application. The touch-screen display has adjustable color scheme and everything-at-a-glance user interface. The settings of measurement parameters as well as results displayed in total counts, number concentration or/and mass concentration as well as PM values(new feature for IAQ application)are all controlled and realized by an internal microprocessor (MCU). The HPC301 simultaneously measures three channel sizes that are configurable by a user. The data stored onboard can be downloaded through either a USB or Bluetooth wireless interface to a smart phone, a tablet or a computer.