HAL-HPC301 is a completely new designed, integrated with the state-of-art technology, handheld laser particle counter. 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) applications. The touch-screen display has adjustable color scheme and everything-at-a-glance user interface. 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.