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Smart Pass-Through™ Chamber—
Double Wall

Service Alerts Ensure Proper Pass-Through Operation

First-of-its-kind Smart Pass-Through monitors “blind-side” conditions (door left ajar or parts loaded and ready to unload), issues service alerts, and activates pass-through accessories, such as Air Shower, UV Sanitizing Module or Ventilation System. Flush-mount design eliminates clean-side surfaces that collect contaminants, and double-wall construction isolates the electronic interlock outside the transfer chamber for optimal cleanliness, strength and rigidity.
Unique double-wall design includes seamless, flush-mount bracket and isolated interlock
Features Key cleanliness high

A Electronic interlock isolated outside the transfer chamber for easy cleaning
B Smart Control Module provides service alerts to operators on both sides
C Flush-mounts to any wall thicker than 2" without special hardware—installs in under three minutes!
D Integral clean-side bracket requires no fasteners or caulking
E Unique design features rounded corners with no cracks or lips; ideal for strict cleaning protocol and easy parts transfer
F Electropolished 304/316 chamber and hardware eliminate surface contaminants and irregularities
G Stainless steel-reinforced, double-wall static-dissipative PVC viewing windows
H Lift-Latch™ eliminates twisting motion and internal contamination of rotary-style latches
I One-piece, heat-formed, non-adhesive gaskets won’t creep or outgas
lipless design cleanseam plus
Seamless, lipless design allows easy parts transfer and cleaning, with digital interlock isolated outside the transfer chamber Smart alert glows to indicate doors are closed; flashes to indicate door ajar and interlock active.
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Service Alerts are wirelessly transmitted to remote plug-in chimes (remote data logging also available)
Smart Control Module: Guarantees Compliance with Operating Protocol
An interlocked pass-through is designed to prevent cross-contamination of a classified space. Situations like these, however, often thwart intended operation:

“Hello? Anyone there?”—Operators often have trouble alerting a colleague on the other side of the wall to unload the chamber.

“If it won’t open, force it!”—a door left ajar locks out the opposing side, frustrating an operator’s attempt to transfer materials. Worse, an operator may pull an interlocked door for till it breaks!

“Power-cord spaghetti”—Smart Pass-Throughs provide a single power connection for many optional features (see full list below):

Micro-filtered air showers blow off contaminants
UV sanitizing modules kill microorganisms
Ventilation modules remove chemical vapors introduced into the chamber Recessed lighting provides easy parts viewing during transfer

Without a centralized power distribution unit, managing connection and operation of such modules becomes a challenge.

pass-through pass-through
Power supply module (on "dirty" side of chamber) simplifies integration of powered options, such as UV-C light or air shower shown here. Optional Recessed LED Light illuminates chamber during parts transfer.

Terra’s unique Smart Control Module overcomes these challenges and ensures that the pass-through is operating as intended. Its dual-side plug-in Service Alerts receive wireless signals and issue warning chimes—momentary to signal sample loading, continuous to signal a door ajar. These signals can be logged to provide a traceable history of pass-through operation.

It also provides a central point of power connection for accessories and triggers operation cycles. Dual timers allow selectable activation delays, door open delays, and cycle duration. See below for additional features.

Why is Electropolishing Critical?
Removes iron and other surface impurities that cause corrosion
Draws chromium and nickel to form a hard, protective finish
Removes irregularities (pits and burs) for an ultra-smooth surface that's easy to clean
More on Terra's electropolishing procedures...
Smart Pass-Through
Outside Dimensions
W" x D" x H" (mm)
Add 2" to width and
1" to height
for cut-out.
Inside Dimensions
W" x D" x H" (mm)
Electropolished 304 SS*
Electropolished 316 SS*

Cat. # Price Cat. # Price


29.5 x 24 x 25.6
(749 x 610 x 650)
24 x 24 x 24
(610 x 610 x 610)
2635-10A-2 call TUI 2635-10A-2-316 call TUI
29.5 x 36 x 25.6
(749 x 914 x 650)
24 x 36 x 24
(610 x 914 x 610)
2635-11A-2 call TUI 2635-11A-2-316 call TUI
41.5 x 36 x 25.6
(1054 x 914 x 650)
36 x 36 x 24
(914 x 914 x 610)
2635-12A-2 call TUI 2635-12A-2-316 call TUI
29.5 x 24 x 37.6
(749 x 610 x 955)
24 x 24 x 36
(610 x 610 x 914)
2635-13A-2 call TUI 2635-13A-2-316 call TUI
29.5 x 24 x 49.6
(749 x 610 x 1260)
24 x 24 x 48
(610 x 610 x 1219)
2635-14A-2 call TUI 2635-14A-2-316 call TUI
35.5 x 30 x 31.6
(902 x 762 x 803)
30 x 30 x 30
(762 x 762 x 762)
2635-21A-2 call TUI 2635-21A-2-316 call TUI
41.5 x 36 x 37.6
(1054 x 914 x 955)
36 x 36 x 36
(914 x 914 x 914)
2635-15A-2 call TUI 2635-15A-2-316 call TUI
41.5 x 36 x 49.6
(1054 x 914 x 1260)
36 x 36 x 48
(914 x 914 x 1219)
2635-16A-2 call TUI 2635-16A-2-316 call TUI
Floor (2) 29.5 x 24 x 37.6
(749 x 610 x 955)
24 x 24 x 36
(610 x 610 x 914)
2635-17A-2 call TUI 2635-17A-2-316 call TUI
41.5 x 36 x 37.6
(1054 x 914 x 955)
36 x 36 x 36
(914 x 914 x 914)
2635-18A-2 call TUI 2635-18A-2-316 call TUI
41.5 x 36 x 49.6
(1054 x 914 x 1260)
36 x 36 x 48
(914 x 914 x 1219)
2635-19A-2 call TUI 2635-19A-2-316 call TUI
* Windows are static-dissipative PVC.
(1) All use a fail-proof mechanical design that requires no maintenance, mounted outside the chamber for optimal cleanliness.
(2) Floor Mount models include low-profile access ramps for easy transport of carts (subtract 1" (25 mm) from internal vertical clearance to compensate for ramps).

Smart Pass-Through Features
Standard Features
  • Double-wall stainless steel construction with electronic interlock isolated outside the transfer chamber
  • 120 or 220VAC power integration of all included options, via power control unit mounted external to transfer chamber for easy cleaning
  • Door Status Alerts: Indicator light issues a solid glow when doors are closed (ready for operation) or flashes when either door is open (interlock active)
  • Door Ajar Alert: Indicator light flashes at increased frequency when either door remains open longer than 30 seconds (delay time adjustable)
  • Plug-In Chimes: receive wireless signals for remote audible door alerts up to 200 feet from chamber (2 units included)
Optional Features
samrt pass-through

Automatic Door—for Hands-Free Operation
Ideal for pharmacy and medical applications, this door is activated by a touchless sensor pad to minimize contamination during sample transfer. Its quiet, low-energy, ADA-compliant electromechanical actuator is installed entirely outside the transfer chamber to simplify cleaning and prevent particle influx. Tested for over a million operations. Typical installation is on “clean” side. See operation video above!

Cat. # Price
2635-60 $ 2,619
  Cat. # Price
UV-C Sanitizing Module
Provides a 254nm UV radiation cycle to kill or neutralize bacteria, viruses and mold spores within the transfer chamber exposure area (line of sight). Digital controls allow program/display of UV cycle duration. Interlocks are automatically activated during UV cycles; status indicator lights flash and audible alerts chime to indicate door lock-out.
2635-50 $ 1,364
Stainless Steel ULPA-Filtered Air Shower
Directs streams of high-velocity, ULPA-filtered air through the pass-through to dislodge contaminants from material surfaces. Standard configuration: air shower is activated when the “dirty-side” door closes; particles are trapped in exit filter on “dirty”-side vent. Interlocks are automatically activated during UV cycles; status indicator lights flash and audible alerts chime to indicate door lock-out. Includes on/off control and cycle adjustment switch.
2635-55 $ 2,065
Ventilation System
Removes solvents and other hazardous vapors from materials while they are in the Smart Pass-Through. System includes a 6" diameter x 3" H exhaust flange (152 mm x 76 mm) and an inlet port for make-up air, equipped with a 99.999% efficient ULPA filter. Requires connection to in-house exhaust system.
2635-57 $ 631
Plug-In Alert Chimes
Alert-chime modules can be plugged in to standard 120VAC wall outlets up to 200 feet away from the the Smart Pass-Through and receive wireless signals any time a door is opened or the interlock is active. (Two units included standard with the Smart Pass-Through.)
2635-58 $ 148
Additional Smart Pass-Through Capabilities
The digital pass-through interlock accommodates a wide range of additional features. Call to discuss your application!
Remote data logging of all access data: user, time, duration, product(s) scanned for entry or removal (requires Bar Code Scanner and/or Biometric Scanner, see below); includes output for integration into centralized Building Management System

Bar code scanner: records data from user badge and/or product bar codes

Biometric scanner (iris or fingerprint reader) activates or releases door locks; can be integrated with data logger for traceable user access

Recessed LED lighting of transfer chamber (ON when door open)

Data logging/documentation of user access and objects transferred (with bar code system)

  Refrigeration module: integration/control of refrigeration unit that maintains 5 degrees C (custom insulated chamber recommended)

Remote wireless control of door locks prevents unauthorized access

Pushbutton Intercom for through-wall communication: pushbutton or touchless keypad activation.

Load presence sensor transmits alert to unload chamber

Indicator panel displays status alerts, operational messages and environmental data

Removable Racks
These electropolished 304 stainless steel racks accommodate removable stainless steel shelves, allowing easy transfer of small parts. Racks mount to a fixture inside the chamber and can be removed and reattached in seconds, allowing easy cleaning and sterilizing of both rack and chamber. Racks must be specified when the chamber is ordered; they cannot be field retrofitted.
  removable rack
For Chamber ID Dimensions
W x D x H, in. (mm)
Removable Racks: EP 304 Stainless Steel,
2 required/chamber
Shelves: EP 304 Stainless Steel;
order racks separately
Cat. # Price Cat. # Price
12 x 12 x 12 (305 x 305 x 305) 2638-50-2 $ 365 2638-60-2 $ 284
12 x 12 x 24 (305 x 305 x 610) 2638-51-2 $ 411 2638-60-2 $ 284
18 x 18 x 16 (457 x 457 x 435) 2638-52-2 $ 398 2638-61-2 $ 347
18 x 18 x 24 (457 x 457 x 610) 2638-53-2 $ 462 2638-61-2 $ 347
24 x 24 x 16 (610 x 610 x 435) 2638-54-2 $ 437 2638-62-2 Call TUI
24 x 24 x 24 (610 x 610 x 610) 2638-55-2 $ 472 2638-62-2 Call TUI
24 x 36 x 24 (610 x 915 x 610) 2638-56-2 $ 524 2638-63-2 $ 411
24 x 24 x 36 (610 x 610 x 915) 2638-57-2 $ 509 2638-62-2 Call TUI
24 x 24 x 48 (610 x 610 x 1220) 2638-58-2 $ 643 2638-62-2 Call TUI
36 x 36 x 36 (915 x 915 x 915) 2638-48-2 $ 632
36 x 36 x 48 (915 x 915 x 1220) 2638-49-2 $ 687

File Type File Name Publication Date
Video Cleanroom Pass-Through Features and Selection Guide
Video introduction of pass-through designs, construction and accessories for Terra's family of cleanroom pass-through chambers. Discover how these chambers increase efficiency and reduce contamination with between-room transfer of samples and supplies.
Video Cleanroom Pass-Through Operational Benefits
Learn about the twelve ways Terra cleanroom pass-through chambers can help overcome your operational challenges such as maintaining cleanliness, reducing cost, and transferring over-sized items into the controlled environment.
White Paper (PDF) Electropolishing Standards and Guidelines
This document provides a description of the electropolishing procedures performed by Terra Universal. It also specifies a series of criteria for evaluating the integrity and cleanliness of the electropolished surfaces.
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