What is a Pass Box? How can this benefit you?

A pass-through box is used to convey materials from one cleanroom to another cleanroom in a facility. It is composed of a rectangular box with two doors on each side. The two doors are linked so they cannot both be opened at the same time, preventing pressure loss and cross-contamination from occurring.

Microtechnology, biological laboratories, pharmaceutical factories, hospitals, food processing industries, LCD factories and electronic factories are just some of the places where it is commonly used to provide clean air quality. Transferring items between rooms with different levels of cleanliness is accomplished through the use of a pass box. This can reduce the time spent opening doors, prevent air convection between different rooms, and reduce the amount of pollution produced.

The Lux Lighting Pass Box Controller accomplishes this by ensuring that Door 2 of a Pass Box is closed before Door 1 of a Pass Box is opened.

There are two Cum Operator LCD Display Panels (LCD Display Panels), one of which will be located above each door and one that will be mounted on both doors. The panel is equipped with a 20×4 blue backlit LCD display, as well as information and status displays for the UV timer, gate status and other functions. When configuring the pass box, the LCD screen is also used.

The Passbox controller also includes connectors for connecting UV lamps, CF lamps and a fan.


  • It is built on a sophisticated controller-based architecture.

  • One of the most impressive features is the existence of a door status indicator on the LCD panel.

  • It has a company name which has been defined by the user. (Settings for pre-shipment)

  • Additionally, the pass-through box controller drives electromagnetic locks that have a built-in door open sensor that provides door feedback.

  • It has a delay between closing door 1 and opening door 2 that can be adjusted (and vice versa).

  • The LCD display panel provides four different types of status indications: GO, WAIT, DOOR OPEN, and DOOR CLOSE.

  • A distinctive feature of this controller is the inclusion of a Buzzer output if the door is left open for a period of time longer than the specified duration.

  • In addition, the controller contains four special multi-function keys: ESC, UP, Down and Menu, which are used to operate the CFL, and the ESC key in program mode.

  • If Manual/Auto-manual mode is selected, UV and FAN will operate.

  • If both doors are closed, the UV LAMP will be activated.

  • When a door is opened, the CF LAMP comes on.

  • Calculation of UV life in hours and minutes. Backup batteries

  • An LED indicates the status of the door on the other side.

Cleaning professionals are well aware of the importance of avoiding cross-contamination between rooms of different cleanroom classes in order to maintain the intended ISO classification and the integrity of products and manufacturing processes. One way to do this is to reduce the amount of stuff that gets moved around.

It is possible for non-viable particles and bacteria to produce contamination in a cleanroom due to the movement of materials in and out of controlled conditions. Material transfer equipment must be designed and installed correctly in order to achieve this goal, among others.

When goods need to be moved between regions with varying cleanliness standards, a pass-through box, also known as a transfer hatch or SAS pass (sterile access system), serves as a barrier between areas. Specifically, the device is used to transport material from an area of ​​lower cleanliness to another area of ​​higher cleanliness and vice versa.

Mechanical and/or electrical interlock systems are installed in each cleanroom pass-through box to reduce the possibility of cross-contamination. This way, only one door can be opened at a time, not two or more, reducing the amount of “dirty” air that can enter the cleanroom and allowing it to function properly.

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