State any two classification of vacuum and their respective pressure range? ?

1. Low vacuum: Pressure range from 1 to 1000 mbar
2. High vacuum: Pressure range from 10^-3 to 10^-9 mbar

Classification of Vacuum

1. Rough Vacuum (Low Vacuum)

- Pressure range: 1013 mbar (atmospheric pressure) to 1 mbar (1 Torr)
- Applications: Filtration, suction, drying

2. Fine Vacuum (High Vacuum)

- Pressure range: 1 mbar to 10^-3 mbar (10 Torr)
- Applications: Semiconductor manufacturing, vacuum coating, particle accelerators