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Clean room, also known as clean room or clean room. It refers to the room specially designed to eliminate the pollutants such as particles, harmful air and bacteria in the air within a certain space range, and control the indoor temperature, cleanliness, indoor pressure, air velocity and air distribution, noise, vibration, lighting and static electricity within a certain demand range. That is to say, no matter how the external air conditions change, the indoor environment can maintain the original performance of cleanliness, temperature, humidity and pressure.
Clean room refers to a controlled environment with low pollution level. The pollution sources include dust, airborne microorganisms, suspended particles, and chemical volatile gases. The clean room has a controlled pollution level, which can be determined by the number of particles per cubic meter of empty space or the maximum particle size.

Clean room classification:
Industrial cleanroom: the control of inanimate particles is the object. It mainly controls the pollution of air dust particles to the working object, and generally maintains positive pressure inside. It is suitable for precision machinery industry, electronic industry (semiconductor, integrated circuit, etc.) aerospace industry, high-purity chemical industry, atomic energy industry, optical and magnetic products industry (optical disc, film, tape production), LCD (liquid crystal glass), computer hard disk, computer magnetic head production and other industries.

Biological clean room: to control the pollution of living particles (bacteria) and inanimate particles (dust) on working objects. It can also be divided into:
A. The general biological clean room mainly controls the contamination of microorganism (bacteria) objects. At the same time, the internal materials should be able to withstand the erosion of various disinfectants, and the internal pressure should be maintained. In essence, its internal materials should be able to withstand all kinds of sterilization treatment of industrial clean room.
B. Biological safety clean room: it mainly controls the pollution of living particles of working objects to the outside world and people. Keep a negative pressure with the atmosphere inside.
Clean room test items:

(including and not limited to the following items)