301 laser particle counter is used to measure the size and quantity of particles within air of unit volume in clean environment; it can directly measure clean environments from clean class 100,000 to 10. This counter has used semiconductor laser power and nixie tube with high-luminance, so it is small, light, highly accurate, easing-operating and microprocessor-controlled. It may store and print the measure results, the printed result will show the clean class of that point and the measure of the clean environment is convenient.

The product is widely used in electronics, optics, chemistry, food, cosmetic, medical science, biological products, aviation, and so on.