Built-in Pass Through Window

The Built-in Pass Through Window is the transfer box designed to sit inside the wall rather than bolted onto its face. The cabinet is recessed into the partition during cleanroom construction, so once the wall is closed up the box sits flush with both sides and no cabinet body protrudes into the corridor or the room. Functionally it is a standard transfer window: a stainless box with an interlock that keeps the two doors from opening at the same time, a double-sided viewing window to confirm contents before opening, and the option of a built-in UV disinfection lamp. The interlock can be mechanical or electronic, and the cabinet is built in 201 or 304 stainless steel, with standard outer sizes running from the 400-type to the 1200-type to match common panel wall openings. Once the wall is sealed around the box, the junction between the cabinet frame and the panel finishes flush on both faces, and servicing the lamp or interlock is reached from the room face rather than from inside the wall.

The installation difference is the whole reason to buy this version. A surface-mounted pass box sticks a metal box out into the aisle, and in a working cleanroom that protruding corner is exactly where passing carts, trollies and stretchers catch - both as a collision hazard and as a dust ledge that the cleaning crew has to work around. Embedding the box inside the wall keeps the corridor width clear and leaves a flat, continuous surface that wipes in one sweep. Because we size the cabinet and the wall cutout together across the 400-to-1200-type range, it lands flush against the buyer's own panel wall thickness instead of leaving an exposed frame on either face. It also simplifies qualification, because the joint between equipment and structure becomes one flat line that is easy to photograph and inspect.