Today, many high precision products have to make use of various level of vacuum at certain stages during the manufacturing process, such as semiconductors, hard drives, and lenses. Laboratories or factories often use vacuum pump that removes gas molecules from a sealed volume to a certain degree in order to create a partial vacuum. In vacuum technology, based on the level of pressure, a partial vacuum is classified as follows:

Rough Vacuum 760 ~ 10 Torr

Medium Vacuum 10 ~ Torr

High Vacuum~ Torr

Ultra-High Vacuum Torr以下

Our national standard for vacuum classification is:

Low Vacuum: 105~102Pa

Medium Vacuum: 102~10-1Pa

High Vacuum: 10-1~10-5Pa

Ultra-High Vacuum: ＜10-5Pa