Pass Box (Static & Dynamic) are specialized devices used in cleanroom environments to transfer materials between areas of different cleanliness levels, minimizing the risk of contamination. These units are essential in pharmaceutical, biotechnology, semiconductor, and healthcare industries where maintaining a sterile environment is critical.
Static Pass Box: A Static Pass Box is a simple, non-powered unit designed for transferring materials between rooms of the same cleanliness level or between a controlled and non-controlled environment. It typically features a mechanical or electronic interlock system, ensuring that only one door can be opened at a time, thus preventing cross-contamination. Static Pass Boxes are ideal for environments where air contamination control is not as stringent but where maintaining a clean transfer is still necessary.
Dynamic Pass Box: A Dynamic Pass Box, on the other hand, is used for transferring materials between areas with different cleanliness levels, such as from a lower grade to a higher-grade cleanroom. It is equipped with HEPA filters and a fan unit to create a laminar flow of filtered air inside the box. This ensures that when the doors are opened, the internal air pressure pushes out any contaminants, maintaining the integrity of the cleanroom environment. The Dynamic Pass Box also features an interlocking mechanism, but with the added benefit of active air filtration, it is better suited for environments where maintaining a strict sterile barrier is crucial.