The transfer window is a box-type device that is installed on the wall of the room interval for material transfer and has the air isolation on both sides of the room. Its purpose is to distinguish the flow of people and logistics clearly, avoid cross pollution, reduce the number of opening and closing doors, and set the transfer window is a method to control pollution and save energy. The biosafety laboratory is mainly used for the separation, culture, detection and other experimental operations of biological risk factors, with considerable biological hazards, so the biosafety transmission window is also a key protection equipment necessary for advanced biosafety laboratories.

Transfer Windows are generally classified by different forms of disinfection, and can also be classified according to different places of use. The disinfection forms are classified into: ultraviolet lamp sterilization, laminar flow sterilization, pulsed xenon light sterilization, hydrogen peroxide sterilization. However, from the perspective of manufacturers, they are more willing to classify from the applicable places. We are generally divided into low level transfer window and high level transfer window.