What are the differences between low vacuum and ultra-high vacuum?

A vacuum range of 0 to -0.1MPa is considered low vacuum.

According to the different magnitudes of gas pressure, vacuum ranges are usually classified as:

1.Low vacuum: 1×105 to 1×102Pa.

2. Medium vacuum: 1×102 to 1×10-1Pa.

3. High vacuum: 1×10-1 to 1×10-5Pa.

4. Ultra-high vacuum: 1×10-5 to 1×10-9 Pa.

5. Extremely high vacuum: below 1×10-9Pa.

Many modern high-precision products require varying degrees of vacuum at certain stages of the manufacturing process to be produced, such as semiconductors, hard disks, and lenses. The method of creating a vacuum in laboratories and factories is to use pumps to extract air from a closed space to achieve a certain degree of vacuum.

In vacuum technology, according to the level of pressure, we can classify it as:

1.Rough Vacuum: 760 to 10 Torr.

2. Medium Vacuum: 10 to Torr.