Fabtech’s Dynamic Passbox is a GMP compliant system is used to transfer materials between classified areas. It has a re-circulatory air system with a certain percentage of air intake as fresh air to keep it under positive pressure. The material airlock serves as a barrier between greyroom and cleanroom It has a microprocessor-based controller to manage door interlock, UV light–hour metre, door open delay and other application based requirements. Validation is per IEST RP with air flow visualisation and specific execution based on application.