{"id":2774,"date":"2026-08-29T11:44:10","date_gmt":"2026-08-29T11:44:10","guid":{"rendered":"https:\/\/www.bionicsscientific.com\/blogs\/?p=2774"},"modified":"2026-08-29T11:44:14","modified_gmt":"2026-08-29T11:44:14","slug":"pass-box","status":"publish","type":"post","link":"https:\/\/www.bionicsscientific.com\/blogs\/pass-box\/","title":{"rendered":"Pass Box: Static vs Dynamic Guide for Cleanrooms, Pharma & Darkroom Applications"},"content":{"rendered":"

Quick Answer<\/b><\/h2>\n

A <\/span>pass box<\/b><\/a> is a controlled transfer chamber built into a cleanroom or lab wall, letting materials move between two areas without personnel crossing over or breaking containment. A <\/span>static pass box<\/b> uses HEPA filtration with no forced airflow; a <\/span>dynamic pass box<\/b> adds a HEPA-filtered blower to actively flush the chamber at a defined air-change rate. Bionics Scientific manufactures both types for pharma, cleanroom, biotech, and darkroom use, with 35 years of manufacturing experience and dispatch across pan-India; the Middle East, Saudi Arabia; the US, and Oman.<\/span><\/p>\n

What Is a Pass Box and Why It Matters<\/b><\/h2>\n

In any facility where contamination control is non-negotiable \u2014 pharma manufacturing, sterile compounding, biotech R&D, hospital pharmacies, or darkrooms \u2014 opening a cleanroom door to hand over a component defeats the point of maintaining pressure differentials and particulate control.<\/span><\/p>\n

A pass box solves this by acting as an airlock for materials, not people. It’s installed flush into a partition wall with an interlocked door on each side; the interlock prevents both doors opening at once, blocking unfiltered air from entering the classified environment. Interiors are finished in powder-coated mild steel or SS304\/SS316, with coved corners to eliminate particle traps.<\/span><\/p>\n

Static Pass Box vs Dynamic Pass Box: The Difference<\/b><\/h2>\n

A <\/span>static pass box<\/b> has no active air handling \u2014 it relies on the HEPA filter (where fitted) and sealed, interlocked doors. It suits lower-risk transfers between similarly classified rooms, e.g., pre-cleaned components between two Grade C\/D areas.<\/span><\/p>\n

A <\/span>dynamic pass box<\/b> adds a HEPA-filtered blower that flushes the chamber continuously (air-change rate is manufacturer-specified, not universal). This makes it standard for higher-grade environments (Grade A\/B, ISO Class 5\u20137), where even momentary particulate spikes matter. Dynamic units typically add a UV germicidal lamp, airflow indicators, and \u2014 in validated pharma settings \u2014 differential pressure gauges.<\/span><\/p>\n

Bottom line:<\/b> similar low-risk rooms \u2192 static. Aseptic or higher-grade transfers \u2192 dynamic.<\/span><\/p>\n

Pass Box in Clean Room and Pharma Applications<\/b><\/h2>\n

In a <\/span>clean room<\/b><\/a>, this unit typically sits between a gowning area and the production floor or between staging and the classified zone. In <\/span>pharma<\/b> manufacturing, it’s a standard fixture between dispensing booths, granulation areas, and packing lines, with design and validation documentation reviewed under facility qualification (IQ\/OQ\/PQ).<\/span><\/p>\n

Buyers should confirm interior finish (SS304 minimum, SS316 for corrosive agents), interlocking type (electromagnetic or mechanical), and whether UV\/pressure monitoring is included\u2014these are specified features, not assumed defaults.<\/span><\/p>\n

Pass Box in Darkroom Applications<\/b><\/h2>\n

In <\/span>darkroom<\/b> settings, the same concept serves a different purpose: moving light-sensitive materials or undeveloped film between a darkroom and a lit workspace without exposure. These units rely on a light-trap baffle design and interlocked doors rather than HEPA filtration as the core function, though contamination control can be added where the darkroom is part of a controlled lab (e.g., forensic or radiography facilities).<\/span><\/p>\n

Specification Table<\/b><\/h2>\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/b><\/td>\nStatic<\/b><\/td>\nDynamic<\/b><\/td>\n<\/tr>\n
Air handling<\/span><\/td>\nPassive (no blower)<\/span><\/td>\nHEPA-filtered blower, continuous supply<\/span><\/td>\n<\/tr>\n
Construction<\/span><\/td>\nPowder-coated MS \/ SS304<\/span><\/td>\nSS304 \/ SS316<\/span><\/td>\n<\/tr>\n
Door interlocking<\/span><\/td>\nMechanical or electromagnetic<\/span><\/td>\nSame, with status indicators<\/span><\/td>\n<\/tr>\n
UV lamp<\/span><\/td>\nOptional<\/span><\/td>\nStandard on most GMP-grade units<\/span><\/td>\n<\/tr>\n
Pressure gauge<\/span><\/td>\nNot standard<\/span><\/td>\nRecommended for aseptic areas<\/span><\/td>\n<\/tr>\n
Best for<\/span><\/td>\nLower-classification transfers<\/span><\/td>\nGrade A\/B, ISO 5\u20137, aseptic transfers<\/span><\/td>\n<\/tr>\n
Sizes<\/span><\/td>\nCustom; common range 600\u00d7600\u00d7600 mm\u2013900\u00d7900\u00d7900 mm (internal)<\/span><\/td>\nSame range; manufacturer confirms volume for air-change calcs<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Exact air-change rate, blower capacity, and dimensions vary by model\u2014request the manufacturer’s datasheet for the specific unit.<\/span><\/i><\/p>\n

Operating Temperature Reference<\/b><\/h2>\n\n\n\n\n\n\n\n
Zone<\/b><\/td>\nTypical Range<\/b><\/td>\n<\/tr>\n
Ambient chamber<\/span><\/td>\n18\u00b0C \u2013 27\u00b0C (HVAC-dependent)<\/span><\/td>\n<\/tr>\n
UV lamp housing<\/span><\/td>\nManufacturer-rated<\/span><\/td>\n<\/tr>\n
Blower motor environment<\/span><\/td>\nStandard indoor cleanroom ambient<\/span><\/td>\n<\/tr>\n
Storage (unpowered)<\/span><\/td>\n10\u00b0C \u2013 40\u00b0C<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

General reference only\u2014confirm against the specific model’s datasheet, since material, insulation, and blower specs affect actual limits.<\/span><\/p>\n

Bionics Scientific: Manufacturer and Supplier<\/b><\/h2>\n

Bionics Scientific has manufactured laboratory and cleanroom equipment for 35 years, with 1900+ autoclaves and allied equipment dispatched pan-India and internationally. It builds both static and dynamic configurations to customer-specified dimensions, with SS304\/SS316 construction and validated interlocking systems for GMP-regulated facilities.<\/span><\/p>\n

Bionics Scientific is a unit of Kartal Projects Pvt Ltd, whose technical file and QMS are independently assessed by <\/span>Euroglobe Registrars (UK<\/span><\/a>)\u2014not a self-declared claim, but a verifiable certificate number per standard, with scheduled surveillance audits.<\/span><\/p>\n

Certifications & Quality Compliance<\/b><\/h3>\n\n\n\n\n\n\n\n
Standard<\/b><\/td>\nCert. No.<\/b><\/td>\nScope<\/b><\/td>\nValid Until<\/b><\/td>\n<\/tr>\n
ISO 9001:2015 (QMS)<\/span><\/td>\n184876<\/span><\/td>\nLab, scientific & cleanroom equipment mfg.<\/span><\/td>\n30-03-2029<\/span><\/td>\n<\/tr>\n
CE (MDD 93\/42\/EEC)<\/span><\/td>\n184877<\/span><\/td>\nProducts as per annexure<\/span><\/td>\n30-03-2029<\/span><\/td>\n<\/tr>\n
GMP<\/span><\/td>\n184878<\/span><\/td>\nIncludes fume hood and a biosafety cabinet.<\/span><\/td>\n30-03-2029<\/span><\/td>\n<\/tr>\n
NSF\/ANSI 61<\/span><\/td>\n183884<\/span><\/td>\nBio-safety cabinet, lab & scientific equipment<\/span><\/td>\n08-03-2027<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

All four are issued by Euroglobe Registrars (UK, est. 2007) with periodic surveillance re-verification, not one-time assessment. Certificate copies are available on request for vendor qualification.<\/span><\/p>\n

Bionics Scientific supplies pan-India and to the <\/span>Middle East<\/b>, <\/span>Saudi Arabia<\/b>, the <\/span>US<\/b>, and <\/span>Oman<\/b>, supporting pharma, biotech, hospital, and industrial cleanroom projects.<\/span><\/p>\n

Frequently Asked Questions<\/b><\/h2>\n

What is a pass box used for?<\/b>\u00a0<\/span><\/p>\n

Transferring materials between two differently classified areas without personnel crossing over, reducing contamination risk.<\/span><\/p>\n

What is the difference between static and dynamic pass box?<\/b>\u00a0<\/span><\/p>\n

Static has no active airflow, relying on filtration and door interlocking alone. Dynamic adds a HEPA-filtered blower that actively flushes the chamber, suiting higher-classification use.<\/span><\/p>\n

Where is a pass box in clean room typically installed?<\/b>\u00a0<\/span><\/p>\n

Between gowning areas and production floors, or staging zones and classified manufacturing areas.<\/span><\/p>\n

Why is a pass box in pharma facilities a GMP requirement?<\/b>\u00a0<\/span><\/p>\n

Uncontrolled material transfer between classified zones is a recognized contamination risk that inspectors specifically assess.<\/span><\/p>\n

What construction material is standard for pharmaceutical pass boxes?<\/b>\u00a0<\/span><\/p>\n

SS304 for most GMP applications; SS316 where corrosive cleaning agents are used.<\/span><\/p>\n

Does every pass box need a UV lamp?<\/b>\u00a0<\/span><\/p>\n

No, UV lamps are standard on most dynamic, GMP-grade units but not required on static units for lower-risk transfers.<\/span><\/p>\n

How is a pass box in darkroom different from a cleanroom pass box?<\/b>\u00a0<\/span><\/p>\n

The darkroom version is primarily a light-trap, using baffled interlocking doors rather than HEPA filtration as the core function.<\/span><\/p>\n

What sizes do manufacturers typically offer?<\/b>\u00a0<\/span><\/p>\n

Custom to the facility opening, commonly 600\u00d7600\u00d7600 mm to 900\u00d7900\u00d7900 mm internal, scaled as needed.<\/span><\/p>\n

What should buyers verify before choosing a supplier?<\/b>\u00a0<\/span><\/p>\n

Stainless steel grade, interlocking type, HEPA integrity test provision, and verified certifications\u2014e.g., Bionics Scientific’s parent, Kartal Projects, holds ISO 9001:2015 (184876), CE (184877), GMP (184878), and NSF\/ANSI 61 (183884), all Euroglobe Registrars (UK)-issued with periodic audits.<\/span><\/p>\n

Can Bionics Scientific supply outside India?<\/b>\u00a0<\/span><\/p>\n

Yes\u2014pan-India and international dispatch to the Middle East, Saudi Arabia, the US, and Oman.<\/span><\/p>\n

Get a pass box quotation from Bionics Scientific<\/b><\/h2>\n

Whether you need a static unit for a lower-risk transfer point or a dynamic, UV-integrated unit for an aseptic suite, Bionics Scientific’s engineering team can specify the right chamber size, air-change rate, and construction grade. <\/span>Contact Bionics Scientific<\/b><\/a> for a technical datasheet and quotation, backed by 35 years of manufacturing experience and ISO\/CE\/GMP-certified production.<\/b><\/p>\n","protected":false},"excerpt":{"rendered":"

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