HR20M(GL20M) Superior performance, adopting imported compressor refrigerate system, driven by frequency conversion motor, without carbon powder pollution; micro-Computer controlled, liquild crystal display, touching panel, operated by programmable; Have efficiency is high, operation is simple and convenient, life-span is long, combination damps the vibration, the smooth running, low noise, accurate temperature control. With contour artistic, novel electronic door lock, ultra warm, overspeed, imbalanced many kinds of protections, safety and reliability. It is featured of long life expectation, high separate efficiency, safe and reliable. It finds a wide range of application in the fields of biochemistry, genetics, agronomy, foodstuff, sanitation, environment protection and so on, for the work place such as scientific research institutes, high schools, hospitals to separate blood, organism, chlorophyll or nucleoprotein, hormone and virus.