Static Pass Box

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A Dynamic Pass Box is a controlled environment device used in cleanrooms and laboratories to transfer materials between areas of different cleanliness levels. It ensures that contaminants are not introduced into the cleanroom environment by maintaining strict airflow control and filtration. The "dynamic" aspect refers to the device's use of airflow (typically HEPA or ULPA-filtered) to actively purge contaminants during the transfer process.

Working Principle

The dynamic pass box uses a blower and HEPA/ULPA filters to create a positive-pressure airflow inside the box. This airflow removes particulates and prevents cross-contamination during material transfer. Interlocking doors ensure that one door opens only when the other is securely closed, maintaining the cleanroom's integrity.