Cleanroom Pass-Through Cabinets — High-Volume Bulk Material Transfer at Full Industrial Scale
In large-scale pharmaceutical, biotechnology, and semiconductor facilities, transferring bulk materials, heavy equipment, raw material drums, or Cleanroom SS Trolleys requires more than a small wall-hatch. Metrolabs provides high-accuracy Cleanroom Pass-Through Cabinets — engineered as floor-to-ceiling or mid-sized structural gateways that handle significant weight and volume while maintaining the environmental integrity of your sterile suite, with a Zero-Ledge philosophy ensuring the bulk transfer process remains as pristine as your most sensitive research.
When Standard Pass Boxes Cannot Meet Your Transfer Volume or Load Requirements
A standard pass box (typically 600×600×600mm internal volume, rated for hand-carried items up to approximately 15 kg) is the right solution for small-item transfer between zones. But pharmaceutical and biotechnology manufacturing logistics require the movement of objects that a pass box cannot accommodate — 25-litre raw material drums, SS 316L cleanroom trolleys loaded with production components, full autoclave loading carts, garment bags for sterile gowning suit transfer, or large-format equipment.
🚥 The Pass-Through Cabinet Principle — Scale Without Compromising Sterility
The Pass-Through Cabinet is the engineering solution that extends the contamination control principle of the pass box to industrial logistics scale — internal volumes from 900×900×900mm to 2400×1800mm, floor loads up to 2000 kg, and door clearances that allow wheeled trolleys, drum lifters, and fork-lift-compatible platforms to transit the cabinet without lifting or tilting. The same electromagnetic interlocking, hermetic silicone gasket sealing, and zero-ledge flush mounting that define the standard pass box are engineered into the pass-through cabinet at every scale — the cabinet functions as an airlock regardless of its internal volume, preventing room air exchange during every transfer event by the same sequential door principle that protects the small pass box.
Available in Static (passive, relying on room pressure differential) and Dynamic (with integrated HEPA H14 active filtration for class-crossing transfers) configurations — giving facility designers the same contamination control flexibility as the pass box family at full industrial logistics scale.
🚥 Pass-Through Cabinet
Large volume · Heavy loads · Trolley-compatible · Floor-mounted · 900–2400mm custom · 2000 kg
🔒 Standard Pass Box
2×2×2 Ft standard · Hand-carried items · Wall-mounted · Small volume · Up to ~15 kg
Four Reasons the Pass-Through Cabinet Requires Different Engineering from a Pass Box
Scaling from a pass box to a pass-through cabinet is not simply making the box bigger — it requires engineering redesign at every component to handle the structural, mechanical, and contamination control demands of industrial-scale cleanroom logistics.
Floor-Level Installation — Eliminating the Lift-Over-Threshold That Creates Contamination Events
A standard pass box is wall-mounted at a working height that requires items to be lifted into the chamber — a loading procedure that is ergonomically acceptable for hand-carried items of a few kilograms but becomes a personnel safety hazard and a contamination risk for heavy drums, trolley loads, and autoclave carts. When a 20 kg drum is lifted over the bottom frame of a standard pass box, the physical exertion required creates increased breathing rate and movement in the gowning suit — the primary source of particle generation by cleanroom personnel. The pass-through cabinet eliminates this risk by being installed level with the cleanroom floor on both sides — the floor of the cabinet is flush with the corridor and cleanroom floors, and items can be wheeled or slid directly into the cabinet without any lifting. The 3mm heavy-gauge SS 316L floor (reinforced below with a welded SS structural framework) is engineered to accept the rolling load of a fully loaded cleanroom trolley — rated at 2000 kg — without deformation. The floor surface is smooth to allow trolley transit without lateral force at the threshold.
Heavy-Gauge Construction — Structural Integrity Under Industrial Load Cycling
A standard pass box uses 1.2–1.5mm SS sheet — adequate for the hand-carried item loads and the infrequent door opening cycles of a typical research or QC pass box application. A pass-through cabinet experiences fundamentally different loading conditions: 2000 kg rolling floor loads from trolley transit, repeated high-force impacts from drum lifter forks and pallet loads, and many more door-open cycles per day from high-volume manufacturing logistics where the cabinet may service 20–40 transfer cycles per shift. Metrolabs pass-through cabinets use 3mm minimum heavy-gauge SS 316L throughout — body panels, floor, ceiling, and door frames — with a welded internal structural framework of SS 316L box section that provides the rigidity to withstand repeated impact loads without deformation. All joints are TIG-welded and ground smooth — no mechanical fasteners, no visible weld beads, and no crevices at internal joints that could harbour contamination.
Full-Height Door Engineering — Large-Format Access Without Contamination Risk
The door of a pass-through cabinet must provide full-clearance access for a loaded SS 316L trolley (typically 600–900mm wide, 1200–1600mm high, loaded to the trolley top-shelf height) — a door opening that must be large enough for the trolley and its operator to enter and exit the cabinet with the items, and that must seal as hermetically as the small pass box door despite its much larger perimeter. The full-height door uses a continuous perimeter silicone gasket (the same medical-grade silicone as the standard pass box, but in a longer continuous ring) with a multi-point locking mechanism that applies even compression force around the full door perimeter — ensuring the gasket seals uniformly at every point on the door frame, preventing any bypass channel at the door corners or mid-points of the long horizontal top and bottom edges. The door is hinged on heavy-duty SS 316L piano hinges rated for the full door weight plus the impact load of the door swinging under gravity when opened — preventing the hinge sag that reduces door-to-frame alignment over time and impairs the gasket seal.
Zero-Ledge Structural Integration — Floor, Wall, and Ceiling Flush
The zero-ledge design requirement for a pass-through cabinet is more complex than for a standard pass box — the cabinet must be flush with the cleanroom floor (to allow trolley transit without a threshold lip), flush with the cleanroom wall panels (to eliminate external dust-collecting ledges), and flush with the ceiling or top panel above (for floor-to-ceiling installations). Achieving floor-level flush installation requires the cabinet to be set into a structural aperture in the cleanroom floor slab — the cabinet base sits in a recessed floor pocket, and the top of the cabinet base is level with the surrounding floor surface. The wall panel junction on both sides is sealed with pharmaceutical-grade silicone — the same inspection-accessible, replaceable seal as the standard pass box. For floor-to-ceiling installations, the top of the cabinet is sealed to the ceiling panel or soffit in the same way. The result is a pass-through cabinet that the cleanroom floor plan and panel layout documentation includes as a structural element, not as a piece of equipment placed in the cleanroom.
How Metrolabs Pass-Through Cabinets Maintain ISO Integrity at Industrial Logistics Scale
Every engineering decision in the Metrolabs Pass-Through Cabinet addresses the specific challenge of scaling contamination control from a hand-carried pass box to a full industrial transfer gateway:
Reinforced Flooring — 2000 kg Rolling Load Rating
The floor of the pass-through cabinet is the most mechanically demanding component in the assembly — it must support the rolling load of a fully loaded cleanroom SS trolley (up to 2000 kg including the trolley, product load, and operator body weight) transmitted through the trolley caster wheels as concentrated point loads rather than distributed loads. A 3mm SS 316L floor plate alone is not sufficient to resist deformation under this concentrated load over the service life of the cabinet — the flat plate deflects under the caster point load and permanently deforms after repeated loading cycles, creating a non-flat floor that makes subsequent trolley transit more difficult. Metrolabs fabricates the cabinet floor from 3mm minimum SS 316L plate with a welded SS 316L box-section structural framework below the floor plate — the framework transfers the concentrated caster loads to the cabinet body frame, which distributes them to the full perimeter of the floor aperture in the building structure. The combination of the 3mm face plate and the structural sub-frame provides a deflection under full rated load of less than 1mm at the centre of the floor span — maintaining a flat, smooth transit surface throughout the service life of the cabinet.
Seam-Free TIG Welding — No Microbial Harbour Points at Any Internal Joint
All internal joints of the pass-through cabinet body, floor, shelf frames, and door frames are TIG-welded and ground smooth to eliminate the rough weld bead surface texture that standard MIG welding creates. The weld bead of a standard MIG weld (Ra 3–6 μm — significantly rougher than the parent SS surface) creates a linear contamination harbour along every internal joint — a surface feature that cleaning cloths cannot reach effectively and that the spray from IPA or VHP disinfectant application cannot penetrate to the base. Over time, these weld bead harbours accumulate organic residue and microbial contamination that becomes progressively more resistant to routine cleaning. TIG welding with appropriate filler wire creates a weld bead that can be ground flush with the surrounding surface and polished to the same finish as the parent material — eliminating the weld bead as a contamination harbour entirely and leaving the internal surface as smooth and wipeable at the joint as at any other point.
Perforated, Adjustable, and Removable Shelving — Flexible Storage with Airflow Continuity
When the pass-through cabinet is used in the Dynamic (HEPA-filtered) configuration, the internal shelving must allow the downward vertical laminar airflow from the HEPA filter to reach all surfaces of every item stored on the shelf — the same requirement as for cleanroom instrument trolleys and material transfer carts. Metrolabs specifies perforated SS 316L shelves (∅25mm / 45mm pitch, approximately 30% open area) that allow the HEPA-filtered air to flow through the shelf surface and contact the lower surfaces of items stored on the shelf — preventing the stagnant air pocket that solid shelving creates below each shelf tier. Shelves are adjustable in 25mm pitch increments and fully removable without tools — allowing the cabinet interior to be reconfigured from shelved storage to open floor space for trolley transit within minutes, and allowing individual shelves to be removed and autoclaved or VHP-treated separately from the cabinet.
Four Specialised Pass-Through Cabinet Configurations — Matched to Your Transfer Requirement
Metrolabs customises pass-through cabinets for the specific logistical, contamination control, and ISO class requirements of your facility:
Static Pass-Through Cabinet — Passive Pressure-Seal for Same-Class Bulk Transfer
The Static Pass-Through Cabinet is the high-volume equivalent of the Static Pass Box — designed for bulk material transfer between two rooms of the same ISO class or from a clean zone to a non-sterile zone, where the contamination control requirement is pressure integrity and zone air isolation, not active surface decontamination of the transferred items. The static cabinet relies on the maintained pressure differential between the two connected rooms and the hermetic sealing of its electromagnetic interlocking door system to prevent cross-contamination during transfer events. Unlike the standard pass box, the static pass-through cabinet accommodates the full range of pharmaceutical bulk logistics — 25-litre reagent drums, autoclave loading trays on trolleys, raw material sacks, large equipment crating, and any item that cannot fit through a standard 600×600mm pass box opening. The floor-flush installation allows wheeled trolleys to transit the cabinet without any lifting — a 2000 kg rated floor load accepts any standard pharmaceutical cleanroom trolley at full load. Available in standard configurations (1200×1200mm or 1500×1500mm internal) or custom dimensions from 900×900mm to 2400×1800mm. Medical-grade silicone gaskets on both doors. Electromagnetic interlock with battery-backed UPS fail-safe. Red/Green LED status indicators on both sides.
Dynamic Pass-Through Cabinet — HEPA H14 Active Filtration for Class-Crossing Bulk Transfer
The Dynamic Pass-Through Cabinet is the high-volume equivalent of the Dynamic Pass Box — equipped with integrated HEPA H14 filtration and a motor-blower system in the cabinet canopy to create a Grade A (ISO Class 5) environment within the transfer chamber during the transfer cycle. This active air-washing of the cabinet interior and the surfaces of bulk items placed within it ensures that materials entering from an unclassified corridor are decontaminated to Grade A surface cleanliness before the inner (cleanroom) door is opened. The scale of the dynamic pass-through cabinet means that the HEPA filtration system must be engineered for the larger cabinet volume — the blower capacity and the number of HEPA filter units are scaled to achieve the required air change rate within the cabinet (typically 400–600 air changes per hour for Grade A classification) while maintaining the downward laminar flow pattern. A G4 pre-filter in the recirculation return extends H14 HEPA filter service life by capturing coarser particles before they reach the HEPA membrane. A differential pressure sensor across the HEPA filter monitors filter loading and provides a replacement alert at the control panel HMI when the pressure differential exceeds the end-of-life threshold. The particle counter (optional) monitors the chamber particle count and signals Grade A achievement before the cleanroom-side door can be released.
Garment Pass-Through Cabinet — Sterile Gowning Suit Transfer from Laundry to Gowning Room
The Garment Pass-Through Cabinet is a specialised configuration for the transfer of sterile cleanroom garments — frocks, coveralls, and hoods — from the cleanroom laundry processing area to the gowning room adjacent to the production suite, without the garments being carried through a non-classified corridor where they could accumulate particles from uncontrolled air. Standard garment transfer in smaller facilities uses a standard pass box — the garments are folded into a transfer bag that fits through the 600×600mm opening. In larger facilities processing multiple suit sizes and types for many personnel shifts, the volume of garment transfer (25–50 suits per shift change, multiple shift changes per day) cannot practically be handled through a standard pass box without creating queue delays at the gowning room entry point. The garment pass-through cabinet provides a larger internal volume — typically 1200×600×1800mm — with integrated SS 316L hanging rails at the standard gowning room rail height, allowing garments to be transferred in hanging configuration without folding (folded garments must be unfolded at the gowning room end of the transfer, adding time to the gowning SOP). The rails are removable for cleaning, autoclavable, and spaced to the standard inter-garment distance for the facility garment type. The cabinet is supplied in the Static configuration (passive, relying on room pressure differential) — garments are clean items transferred from the laundry to the gowning room and do not require active surface decontamination in transit.
Sump-Base Pass-Through Cabinet — Liquid-Tight Spill Containment for Reagent Transfer
The Sump-Base Pass-Through Cabinet is a specialised configuration for the transfer of liquid reagents, solvent containers, and acid/base solutions in bulk quantities — where the primary additional engineering requirement beyond the standard pass-through cabinet is the containment of any accidental spill during the transfer event, protecting the cleanroom floor and its specialised epoxy or vinyl coating from chemical damage. Standard pass-through cabinets have a flat floor that does not contain spilled liquids — a container that falls or leaks during loading or transit allows the spilled liquid to flow directly onto the cleanroom floor. The sump-base configuration recesses the cabinet floor to create a liquid-tight basin — a pressed SS 316L tray with a continuous welded perimeter forming an inward-sloping basin that drains to a central collection point. The sump volume is specified at a minimum of 110% of the volume of the largest single container being transferred — ensuring that a complete container failure is contained within the sump without overflow. For flammable solvent transfer, the sump-base cabinet includes an ESD grounding connection at the sump drain point — any static charge accumulating on the solvent container during transit is dissipated to earth through the metallic sump before it can create an ignition risk. The sump base is available with a drain valve for emptying after a spill without removing the cabinet from the wall aperture.
Six Engineering Features Across All Metrolabs Pass-Through Cabinets
Every Metrolabs Pass-Through Cabinet is built to these standards — making it a critical air-management structural component rather than a large storage unit in the cleanroom wall:
SS 316L Surgical Grade — Maximum Corrosion Resistance against VHP and IPA
The entire cabinet — body panels, floor, ceiling, door frames, shelf frames, hanging rails, and all internal structural members — is fabricated from SS 316L surgical grade. SS 316L is specified because the combination of VHP at 1000 ppm (required for room-wide decontamination cycles), IPA at 70% concentration (daily wipe-down), PAA at 0.5% (periodic enhanced disinfection), and the mechanical impact loads from trolley transit and drum handling creates a corrosion and surface degradation challenge that SS 304 cannot match. The molybdenum content of SS 316L provides the pitting corrosion resistance that SS 304 lacks against the chloride ions present in standard pharmaceutical disinfectant solutions. All SS 316L components are passivated to ASTM A967 after fabrication — the passivation process removes any iron contamination from the surface layer and promotes the formation of the chromium oxide passive film. Material test certificates (MTCs) for all SS 316L components and the ASTM A967 passivation certificate are supplied at handover.
Electromagnetic Interlocking — Fail-Safe with Emergency Override
The electromagnetic interlock system of the pass-through cabinet uses a logic PCB that enforces sequential access — only one door can be open at any time. The PCB is powered from a battery-backed UPS — power loss defaults to both doors locked. Emergency override: an integrated safety release system allows manual door operation in the event of a power failure — operated by a supervisor-level keyswitch (not accessible to standard operating personnel) that releases the electromagnetic lock on the selected door, allowing the door to be opened for emergency access. The emergency override activates an audible alarm and a latching LED indicator that records the override event for subsequent inclusion in the facility deviation log. Digital LED status displays on both sides of the cabinet show door status (open/closed), lock status (locked/available), and any active UV-C or HEPA filtration cycle — providing real-time feedback to personnel on both sides without requiring communication through the wall.
Zero-Ledge Flush Mounting — Natural Extension of Cleanroom Panel System
The Metrolabs Pass-Through Cabinet is designed to be installed as a natural extension of the modular cleanroom panel system — flush with the panel face on both the corridor and cleanroom sides, flush with the floor on both sides (for floor-level installations), and sealed with pharmaceutical-grade silicone at all panel junctions. The external surface of the cabinet body on the cleanroom side is brushed SS 316L — matching the visual appearance of SS panel components in the cleanroom architecture. No external protrusions, no exposed fastener heads, no visible structural frame members. The panel-to-cabinet junction is sealed with pharmaceutical-grade silicone that is visible, inspectable, and replaceable without disturbing the cabinet body or its structural mounting — the most common cause of progressive contamination at pass box installations is the deterioration of the junction seal, which is masked from inspection by the pass box frame profile.
Perforated Adjustable Shelving — Flexible Storage with Airflow Continuity
Metrolabs pass-through cabinets are supplied with perforated SS 316L shelves (∅25mm / 45mm pitch, ~30% open area) adjustable in 25mm pitch increments on a smooth-bore peg system. Shelves are fully removable without tools — pulled forward and lifted from the peg supports — for cleaning, autoclaving, and cabinet reconfiguration. For trolley-transit installations, all shelves are removed to provide a clear floor-to-ceiling interior; for bulk item storage applications, shelves are configured at the heights that best match the item dimensions being transferred. The perforated shelf design allows HEPA-filtered air (in dynamic configurations) to flow through the shelf surface and contact the lower surfaces of items — preventing the stagnant zone that solid shelving creates. Lipped-edge shelves (20mm marine-edge perimeter) are available for reagent and liquid container transfer applications where lateral containment of containers during transfer is required.
UV-C Sterilisation — Optional Automated Idle-Period Surface Disinfection
Optional integrated UV-C germicidal lamps provide automated surface disinfection of the cabinet interior and of bulk items placed in the cabinet during the idle period between transfer cycles. The UV-C lamps are mounted in the upper corners of the cabinet interior — positioned to provide coverage of all shelf surfaces and all interior wall surfaces, with no shadow zones in the cabinet volume. Door-interlocked: UV-C cannot be activated when either door is open. Programmable cycle timer at the control panel (15–60 minutes). Auto purge after deactivation before the next transfer cycle. Optional UV-C hour meter. The UV-C system is supplementary to — not a replacement for — the primary contamination control provided by the electromagnetic interlocking and hermetic sealing of the cabinet doors.
Full-Height Ergonomic Doors — Compliant Access Without Unnecessary Lifting
The full-height doors of the pass-through cabinet are designed for ergonomic access — allowing staff to move bulk materials into and out of the cabinet without unnecessary lifting or bending, and without removing any gloves or gowning components to handle the door mechanism. The door handle is an SS 316L pull bar (not a lever or knob that requires a twisting motion that is difficult in double-gloved hands) positioned at the correct ergonomic height for the operating PPE stack. The door is balanced by concealed heavy-duty SS 316L piano hinges rated for the full door weight, preventing the door from swinging freely under gravity when opened to a position beyond 90° — a common cause of door-frame impact damage in high-traffic pass-through locations. Toughened safety glass viewing panels are mounted flush with the door frame surface — zero-ledge glass profile — allowing visual inspection of the cabinet contents before opening without protrusions that collect dust or create cleaning obstacles.
Pass-Through Cabinet — Standard Specification
Metrolabs Pass-Through Cabinet standard parameters — customisable at every dimension and feature:
| Feature | Metrolabs Standard | Benefit |
|---|---|---|
| Material | SS 316L Surgical Grade — ASTM A967 | Max corrosion resistance — VHP + IPA |
| Body Wall Thickness✓ Std | 3mm minimum heavy-gauge | 2000 kg load — impact resistant |
| Mounting | Wall-recessed or floor-mounted | Seamless modular panel integration |
| Floor Load Rating | 2000 kg — reinforced structural sub-frame | All standard cleanroom trolleys safe transit |
| Standard Dimensions | 900 / 1200 / 1500 / 1800 / 2400mm | From large pass box to full airlock |
| Shelving | Perforated SS 316L — adjustable — removable | Flexible — airflow continuity |
| Gaskets | Medical-grade silicone — full perimeter | Hermetic airtight seal — VHP compatible |
| Interlock | Electromagnetic — logic PCB — battery UPS | Fail-safe — pressure cascade maintained |
Pass-Through Cabinets Across Every Large-Scale Regulated Sector
Industrial-scale contamination control for every cleanroom where bulk logistics require a transfer gateway beyond the capacity of a standard pass box:
Pharmaceutical GMP
Static pass-through cabinets for bulk raw material receipt — 25-litre drums, raw material sacks, and large-format packaging transit. Dynamic HEPA option for class-crossing bulk entry. Garment cabinets for shift-change gowning logistics. Full GMP IQ documentation at handover.
Aseptic Manufacturing
Dynamic pass-through cabinets for bulk component entry into aseptic Grade A/B suites — stopper and cap transfer in bulk containers, large vial tray carts, and component autoclave loading carts. H14 HEPA Grade A scrubbing of all surfaces.
Semiconductor Fabs
Large-format pass-through cabinets for process equipment component transfer across ISO class boundaries. Wafer cassette bulk lot transfer. Dynamic HEPA option for class-crossing. ESD-safe interior specification available for static-sensitive components.
Biotech & ATMP
Pass-through cabinets for bioreactor accessory and single-use component bulk transfer into ATMP manufacturing suites. Sump-base option for liquid reagent and media bag transfer. Garment cabinets for ATMP suite high-volume gowning logistics.
Hospital & CSSD
Pass-through cabinets for sterile supply bulk transfer from CSSD to hospital pharmacy, OT complex, and ward dispensing stores. Garment rails option for sterile theatre wear transfer. NABH compliant. Full-height doors for trolley-mounted sterilisation tray transit.
Chemical Transfer
Sump-base pass-through cabinets for bulk reagent, solvent, and hazardous chemical transfer between classified chemical handling areas. Liquid-tight 110% sump volume. ESD grounding for flammable solvent transfer. COSHH compliant engineering controls.
Food & Beverage
Pass-through cabinets for FSSAI high-care food production zone bulk ingredient entry, packaging component transfer, and large equipment transit. Floor-flush trolley-compatible installation. SS 316L throughout for food-contact compliance.
BSL Containment
Large-format pass-through cabinets for BSL-2 and BSL-3 bulk material entry and waste removal logistics. Dynamic Dual-HEPA option (H14 supply + H14 exhaust) for high-containment bulk transfer. Emergency override. Full containment documentation.
High-Accuracy Fabrication for ISO-Classified Environments
Metrolabs focuses on high-accuracy fabrication for pass-through cabinets — a Metrolabs cabinet is a critical air-management structural component, not just a large storage unit:
Zero-Ledge Exterior — Natural Extension of Your Cleanroom Partition System
Metrolabs flush-mount design ensures that the pass-through cabinet becomes an integrated element of the cleanroom partition system — flush with the panel face on both sides, sealed with pharmaceutical-grade silicone at every junction, and presenting a brushed SS 316L external surface that matches the aesthetic of the surrounding panel architecture. No external surfaces for dust to settle — the cabinet exterior is as cleanable as any other section of the cleanroom wall.
UV-C Sterilisation — Optional Automated Layer of Surface Disinfection
Optional integrated UV-C germicidal lamps provide an automated surface disinfection layer for materials sitting within the pass-through cabinet chamber between transfer cycles — particularly valuable in high-transfer-volume applications where the cabinet receives items continuously throughout the shift and there is limited opportunity for manual wipe-down disinfection of cabinet surfaces. The UV-C system adds a passive decontamination step to every idle period without requiring operator intervention.
Digital Status Displays — Real-Time Feedback on Door and Sterilisation Cycle Status
High-visibility LED status displays on both sides of the pass-through cabinet provide real-time feedback on door status (open/closed), lock status (available/locked), active UV-C cycle status, and — for dynamic configurations — HEPA filter status and chamber Grade A confirmation. The digital display eliminates the ambiguity of simple Red/Green LED indicators — personnel on both sides can read the current cabinet state without any interpretation of a simple colour code.
Sump-Base Pass-Throughs — Liquid-Tight Spill Containment for Reagent Logistics
For facilities moving large quantities of liquid reagents, the sump-base pass-through cabinet provides a liquid-tight, recessed floor base to safely contain any accidental spill during the transfer process — protecting the facility’s specialised cleanroom flooring from chemical damage and protecting personnel from slipping on spilled liquid at the transfer threshold. The sump volume is specified at 110% of the largest single container volume being transferred — ensuring that a complete container failure is fully contained within the sump without any liquid reaching the cleanroom or corridor floor.
Pass-Through Cabinet vs Standard Pass Box vs Basic Hatch
From Logistics Assessment to Installed & Commissioned Pass-Through Cabinet
Metrolabs manages the complete pass-through cabinet supply and installation process — from logistics assessment through custom fabrication, installation, and IQ documentation:
Logistics & ISO Assessment
Transfer material type (bulk / trolley / garment / liquid), maximum item dimensions and weight, ISO classes of both zones, floor structure at installation point (for floor-flush recess), building structure at wall aperture, configuration (static / dynamic / garment / sump-base), optional features (UV-C / LED display / emergency override / sump drain), and documentation requirements confirmed. Custom dimensioned drawing and structural detail produced and signed off.
Custom Fabrication
Body fabricated from 3mm SS 316L — TIG-welded all joints. Structural sub-frame welded below floor plate. Floor surface polished smooth. EM interlock PCB installed and tested. HEPA canopy installed (dynamic). UV-C lamps mounted (if fitted). LED displays wired. Silicone door gaskets fitted. Perforated shelves / hanging rails installed. Emergency override keyswitch fitted. ASTM A967 passivation performed. MTCs issued.
Installation & Commissioning
Cabinet installed into floor aperture and wall aperture. Floor-to-cabinet level confirmed (trolley threshold gap <2mm). Panel-to-cabinet junction sealed pharma-grade silicone. EM interlock tested (both sequences, fail-safe power loss, emergency override). HEPA filter DOP test (dynamic). LED display calibration. UV-C interlock test. Full trolley transit test. Floor load test at rated capacity. All results documented.
IQ Documentation
SS MTCs, ASTM A967 passivation cert, EM interlock test record, emergency override test record, HEPA DOP test record (dynamic), floor load test, UV-C interlock test, LED display calibration record, floor-level measurement record, panel junction silicone application record, and commissioning photos compiled for GMP IQ qualification submission at handover.
Factory & Office
4, SIDCO-MICRO, Thirumudivakkam,
Chennai – 600 132, Tamil Nadu
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Website & GSTN
www.metrolabs.biz
www.schoollabfurniture.com
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Ready to Install Pass-Through Cabinets in Your Cleanroom?
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