The cleanliness classification range of cleanrooms typically spans from Class 1 to Class 100,000 (hundred thousand), with smaller numbers indicating higher cleanliness levels.
Level 1: Used in the microelectronics industry for manufacturing integrated circuits, with extremely high requirements.
Grade 10: Primarily used in the semiconductor industry for applications with bandwidth less than 2 micrometers.
Class 100 (Hundred Level): The number of dust particles with a diameter of 0.5 micrometers or larger per cubic meter does not exceed 3,500. It is commonly used in sterile manufacturing processes in the pharmaceutical industry.
Class 1000 (Thousand-class): The number of dust particles smaller than 0.5 micrometers per cubic meter is controlled below 3,500, used for the production of high-quality optical products.
Class 10,000 (10,000-level): The number of dust particles greater than or equal to 0.5 microns per cubic meter is controlled within 35,000 particles, suitable for the assembly of hydraulic or pneumatic equipment.
Class 100,000 (100,000-class): Used in many industrial sectors, such as optical product manufacturing and food and beverage production.

Class 100 (ISO Class 5): Integrated circuit manufacturing, vaccine production, high-end optical components, and implantable medical devices.
Class 1000 (ISO Class 6): Medical device assembly, pharmaceutical production, and high-quality optical product testing.
Class 10,000 (ISO Class 7): Food and beverage processing, cosmetics production, conventional pharmaceutical manufacturing, and plant tissue culture.
Class 100,000 (ISO Class 8): Automotive components, machining, electronic component assembly, food packaging.
Class 300,000 (ISO Class 9): Suitable for scenarios with less stringent cleanliness requirements, such as agricultural cultivation, textile manufacturing, and warehousing.