A dedicated route for tools, components and materials
A pass-through box gives people on either side of a partition a place to exchange items without using the main personnel doorway for each transfer. STJH’s product offer describes sealed chambers, interlocked doors and cleanable surfaces, with options selected for the installation. Its listed applications include electronics, precision assembly and laboratory environments.
For an electronics workshop, a useful starting point is the largest tray or packaged component that needs to pass through. For a laboratory, start with the actual containers and the facility’s handling procedure. These are project-planning examples—not claims about a named STJH customer.
Choose the configuration around the transfer task
STJH lists mechanical or electronic interlocks, custom chamber sizes, and optional self-cleaning airflow and control functions. For a new cleanroom, bring the chamber and partition requirements into one enquiry. For an existing room, begin with the wall opening and the items you need to transfer, then discuss the configuration that fits that installation.
The distinction between a plain transfer chamber and one with airflow matters. KleanLabs’ product-family comparison, for example, separates static, building-ventilated and self-contained filtered designs. Product names vary between manufacturers; the useful questions are where the air comes from, whether there is a fan/filter assembly, and what the facility requires. Those categories are a discussion aid, not a claim that every supplier offers identical equipment.
| Your project priority | Discuss with STJH | Record in the proposal |
|---|---|---|
| Moving the intended items comfortably | Tray or container envelope and handling method | Usable internal dimensions and access opening |
| Fitting an existing partition | Wall construction, thickness and available space | Installation drawing and mounting scope |
| Coordinating both doors | Interlock type and desired status indication | Door operation and functional checks |
| Adding filtered airflow | Whether the process calls for it and available services | Included fan/filter equipment, access and maintenance information |
| Keeping the box serviceable | Cleaning method, access and replaceable parts | Material/finish selection and care documentation |
Bring the enclosure and equipment discussion together
STJH’s company overview describes cleanroom panels, ceilings, doors, windows, fan-filter units, filters and transfer equipment, plus export packaging and remote installation guidance. This makes it possible to ask about the pass box as part of a coordinated supply package rather than an isolated purchase.
Its prefabricated modular cleanroom offer also identifies configurable room layouts and equipment openings. If you are planning a new room or refurbishment, mark the transfer location on the layout early so the enclosure and equipment proposals use the same dimensions. Installation, commissioning and facility qualification responsibilities should be listed separately in the agreed scope.
A practical enquiry package
- Sketch the journey. Mark the origin and destination of the items, the transfer location and the people who handle them. Add a photo or plan of the existing wall if available.
- Describe the load. Give item dimensions with packaging or trays included, handling frequency and any relevant material or cleaning constraints.
- List the facility requirements. Include the required room conditions, available utilities and any project-specific documentation requirements. Let the responsible facility team define these.
- Agree the first checks. Review the dimensional drawing, inspect the delivered configuration against the order, and arrange interlock/function checks according to the supplier’s instructions and your facility acceptance plan.
A common sizing mistake is treating the outside cabinet size as usable chamber space. A simple improvement is to show both on the same drawing, along with the door opening and nearby obstructions. This helps the quotation describe a usable installation.
Explore the related products on CNFX
Start with the Pass-through Chamber category. For a wider cleanroom equipment enquiry, see HEPA Filter and Fan Filter Unit. These categories are associated with STJH’s CNFX profile; the final equipment combination depends on the quoted project.
Questions for planning your purchase
Can I order a custom size?
STJH publishes custom dimensions as an option. Send the required usable space and wall details so the supplier can propose the complete cabinet and opening dimensions.
Does every pass box include a filter?
No. Check the proposed configuration: a transfer chamber and a filtered-airflow unit are different purchasing scopes. Ask which components and services are included.
Does buying a pass box qualify the whole room?
No. Room qualification is a facility-level task. The box should be selected and accepted as part of that project; this product spotlight does not certify a cleanliness class or sterilization result.
Send your enquiry to Suzhou Shengtong Jiuhe Electromechanical Technology Co., Ltd.
Sources and scope
Source pages checked on 15 September 2026. Product availability and customization are attributed to STJH; the enquiry worksheet and planning examples are CNFX editorial suggestions. No project price, delivery date or validated facility performance is promised here.