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How to Choose the Best Pass Box: A Complete Guide

2025-04-22

Pass Boxs are widely used in cleanrooms, laboratories, hospitals, and pharmaceutical plants to safely transfer items between different cleanliness zones while minimizing cross-contamination. Selecting the right Pass Box is crucial. Here are the key factors to consider:

1. Determine the Type of Pass Box

Mechanical Interlock Pass-Through: Uses a mechanical mechanism to prevent both doors from opening simultaneously, avoiding air exchange.
Electronic Interlock Pass-Through: Features electronic controls, with optional alarms and logging for high-cleanliness environments.
Self-Cleaning Pass-Through: Equipped with UV lights or HEPA filters to sterilize or filter particles.
Laminar Flow Pass-Through: Provides unidirectional airflow to maintain positive or negative pressure, ideal for high-cleanliness applications.

2. Consider Material and Sealing

Stainless Steel: Corrosion-resistant and easy to clean, suitable for pharmaceutical and biological labs.
Tempered Glass or Acrylic Window: Allows visibility of transferred items.
High-Quality Seals: Ensures airtightness to prevent contamination.

3. Evaluate Cleanliness Requirements

Choose the appropriate cleanliness level based on ISO 14644 or GMP standards.
If sterilization is needed, opt for a UV-equipped pass-through.

4. Size and Installation Method

Select a size that accommodates the items being transferred.
Confirm whether an embedded or wall-mounted installation suits the site requirements.

5. Additional Features

Smart Controls: Touchscreen, access management, data logging, etc.
Explosion-Proof Design: Essential for hazardous material labs.
Quiet Operation: Reduces noise disturbance.

6. Brand and After-Sales Service

Choose reputable brands for reliable quality.
Check warranty policies and technical support.

When selecting a Pass Box, consider its type, material, cleanliness level, size, and additional features to ensure it meets your operational needs. A high-quality Pass Box enhances efficiency while maintaining a contamination-free environment.