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Its clean room can also be called clean workshop, it is the air in the particles, harmful air, bacteria, as well as temperature, humidity, pressure control in a certain range of special room. However, the product is different, so the standard level of the dust-free workshop used is not the same.

The standard level of dust-free workshop is divided into: grade 1, grade 100, grade 1000, grade ten thousand, grade one hundred thousand, grade one million. Level 1 is the highest level, with levels ranging from 100 to 100,000 being the most common.

1, one hundred thousand grade clean workshop is used in many industrial sectors, such as optical product manufacturing, for the manufacture of small components large electronic system, hydraulic or pneumatic system manufacturing, food and beverage production, medical, pharmaceutical industry also often use this level of clean workshop.

2, 10,000 class clean workshop is used for the assembly of hydraulic equipment or pneumatic equipment, in some cases also used in the food and beverage industry, in addition to 10,000 class clean workshop is also very common in the medical industry.

3, 1000 class dust-free workshop is mainly used for the production of high quality optical products, but also used for testing, assembly of aircraft screw instrument, assembly of high quality miniature bearings, etc.

4, many people believe that this level of clean workshop is the most commonly used and therefore the most important clean workshop, this clean room is widely used in, such as the manufacture of objects in the body, surgery, including transplant surgery, the manufacture of synthesizer, those who are particularly sensitive to bacterial infection of the patient isolation treatment.

5, ten level of this level of dust-free workshop is mainly used for bandwidth less than 2 micron semiconductor industry.

6, level 1 dust-free workshop is mainly used for the manufacture of integrated circuit microelectronics industry, the precise requirements of integrated circuit is submicron.