Specification builder · Tier B
Biological safety cabinet, Class II Type A2 (standard), with Type B2 total-exhaust and Class III glove-box cabinets as advanced / separate options
A biological safety cabinet (BSC) is a ventilated enclosure with HEPA-filtered air that protects the worker, the sample and the room while handling infectious material. Class II Type A2 is the normal choice for hospital microbiology, TB culture, PCR sample extraction, public health and pharma microbiology labs; Type B2 (fully ducted) is only for work that also involves volatile toxic chemicals, and Class III (sealed glove box) is for the highest-risk agents. Buyers are hospital and public health laboratories, TB programmes, pharma QC microbiology units and research institutes.
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Standards this specification draws on
- NSF/ANSI 49 (2024) US standard for Class II cabinets (Types A1, A2, B1, B2, C1): design, microbiological containment type test, and field certification methods.
- EN 12469 (2000; revised as EN 12469-1/-2/-5, 2025) European performance standard for microbiological safety cabinets; the 2025 revision splits classes into parts and adds installation/commissioning and maintenance requirements.
- JIS K 3800 Japanese Class II BSC standard, accepted as an equivalent type-test basis.
- YY 0569 Chinese standard for Class II biosafety cabinets, the usual basis for Chinese makers' type tests.
- WHO Laboratory Biosafety Manual, 4th ed. (2020) and monograph 'Biological safety cabinets and other primary containment devices' Risk-based guidance on choosing, placing, using and certifying BSCs; does not recommend relying on UV lamps.
- EN 1822 / ISO 29463; IEST-RP-CC001 Classification and testing of HEPA/ULPA filters (H14 = 99.995% at MPPS).
- IEC/EN/UL 61010-1 Electrical safety of laboratory equipment.
- ISO 14644-1 Cleanroom air cleanliness; the work zone should meet ISO Class 5 for product protection in pharma use.
Common mistakes in tenders for this equipment
- Copying one brochure's exact figures (e.g. 'inflow 0.53 +/- 0.025 m/s', 'ULPA 99.9995% at 0.12 um', exact external dimensions in mm) so only one brand can comply; specify minimums and ranges from the standards instead.
- Accepting 'conforms to NSF 49 / EN 12469' with no verifiable type-test certificate for the exact model and size offered.
- Buying a laminar-flow clean bench or PCR workstation labelled as a 'biosafety cabinet'; these protect only the sample, not the worker.
- Requiring a UV lamp as essential, or using UV instead of surface disinfection, against WHO advice.
- Ordering Type B2 for routine microbiology, then having no dedicated exhaust fan; a B2 without correct exhaust is less safe than an A2.
- Leaving out on-site field certification (PAO/DOP filter scan, inflow/downflow) and annual recertification from the contract, so the cabinet is never tested after delivery.
- Not checking room size, door width, clearances (300 mm sides/back, 300 mm above) and placement away from doors and supply-air diffusers before the tender.
- Insisting on NSF listing only (or EN only) without reason, which excludes equally certified cabinets and reduces competition.