Pass Box

A cleanroom is a controlled environment that filters pollutants like dust, airborne microbes, and aerosol particles to provide the cleanest area possible. A pass box, which is also called a transfer hatch or SAS pass (sterile access system), works as a barrier between areas with different levels of cleanliness when materials do have to be moved. The equipment is used to transfer material from an area of lower cleanliness to an area of higher cleanliness, and vice versa. A pass box is designed in two different types; static and dynamic and it is the user-specific requirement which decides the right design configuration.