Cleanroom Interlocking Doors
Cleanroom Interlocking Doors: Secure Pressure & Contamination Control
In high-containment environments, the most significant risk to sterility is the simultaneous opening of multiple doors, which can cause a collapse in pressure differentials and lead to cross-contamination. Metrolabs provides high-accuracy Cleanroom Interlocking Systems, designed to manage the flow of personnel and materials while maintaining a hermetic “air-lock” environment.
Our interlocking doors are essential for pharmaceutical suites, BSL-rated laboratories, and sterile healthcare zones where atmospheric integrity is non-negotiable.
How the Metrolabs Interlocking System Works
The interlock (or “mantrap”) system is an electronic logic-based solution that ensures only one door in a designated zone can be open at any given time.
Logic-Based Entry: When Door A is opened, Door B is electronically locked and cannot be opened until Door A is fully closed and the room pressure has stabilized.
Visual Status Indicators: Every entry point is equipped with LED traffic-light indicators (Red/Green) to inform personnel when it is safe to proceed.
Emergency Overrides: In the event of a fire or power failure, the system is programmed to release all locks automatically, ensuring a safe exit path for personnel.
Key Components & Features
Metrolabs integrates the latest in electronic control to ensure long-term performance and safety.
Electronic Controller (PLC)
The "brain" of the system, our programmable controllers manage the timing and logic of the door sequences. We can customize the "dwell time" (the delay between one door closing and the next being allowed to open) to ensure your HVAC system has enough time to recover the required pressure levels.
Touchless Sensors & Indicators
To prevent surface-to-surface contamination, our systems are often paired with: Wave-to-Open Sensors: For hands-free entry. LED Indicators: High-visibility status lights integrated directly into the door frame or wall.
Electromagnetic (Mag-lock) or Bolt Locks
We utilize high-strength, flush-mounted electromagnetic locks. Hygienic Design: No moving mechanical parts or deep crevices, making them easy to sanitize. Airtight Integration: Installed within the frame to maintain the smooth surface of our Modular Cleanroom Panels.
Applications in Controlled Environments
| Facility Type | Primary Goal | Interlock Configuration |
| Pharmaceutical | Cross-contamination prevention | 2-Door or 3-Door Entry Airlock |
| Microbiology (BSL-3) | Bio-containment | Negative pressure air-lock with timed delay |
| Operating Theaters | Maintaining positive pressure | Main entry/exit interlocking |
| Material Pass-Throughs | Sterile material transfer | Interlocked small-scale hatch doors |
The Metrolabs Advantage
We don’t just install locks; we engineer a comprehensive access strategy. A Metrolabs interlocking system is designed to work in perfect harmony with our Hermetically Sealed Doors and Air-tight Doors, ensuring that your facility remains a secure, high-performance environment.
Custom-Built Logic: Whether you need a simple 2-door loop or a complex multi-room sequence, we program the system to fit your specific operational workflow.
Compliance Guaranteed: Our systems are designed to meet international GMP and ISO 14644-3 requirements for air-lock integrity.
Technical Insight: For facilities handling sensitive biological agents, we can integrate “Air-Shower” logic into the interlock sequence, ensuring personnel are decontaminated before the secondary door is released.