Class II Biological Safety Cabinets (BSCs) for Personnel, Product & Environmental Protection
Class II biological safety cabinets (BSCs) are the workhorse containment solution in research, clinical, microbiology, and sterile-processing labs. Designed to protect laboratory personnel, products, and the environment simultaneously, these cabinets use HEPA-filtered downflow and inflow air, defined sash openings, and strict airflow patterns that meet standards such as NSF/ANSI 49 and EN 12469.
Our portfolio of Class II BSCs includes Types A1, A2, B1, and B2 — allowing you to match cabinet design to your specific containment needs, chemical compatibility, and exhaust requirements. Whether you are working with cell culture, vaccine production, diagnostic microbiology, or aerosol-generating procedures, ARES Scientific offers units featuring motorized sashes, LED lighting, digital airflow controls, UV/LED decontamination cycles, and ergonomic design.
Selecting the right Class II cabinet involves more than choosing a size — it requires evaluating your biosafety level, reagent and gas usage, exhaust path, workspace ergonomics, and certification requirements. ARES Scientific helps assess ducting needs, airflow performance, filter access, and certification documentation to ensure safe, repeatable operation with minimal workflow disruption.
Key Selection Factors for Class II Biological Safety Cabinets
- Cabinet Class & Type: Understand the differences between Type A1, A2, B1, and B2 — each offers different exhaust configurations, chemical compatibility, and recirculation behavior.
- Airflow & Sash Design: Confirm proper face velocity, sash height, and overall ergonomics to ensure the cabinet maintains safe and consistent airflow patterns.
- Exhaust Path & Ducting: Determine whether recirculation is appropriate or if 100% exhaust through hard ducting is required, as in Type B2 applications involving volatile chemicals.
- Filter Certification & Maintenance: Ensure HEPA (or ULPA, if required) filters meet performance standards and that the cabinet is designed for straightforward access and servicing.
- Workspace Size & Ergonomics: Choose internal workspace dimensions, sash type, lighting, and utility ports based on workflow needs and user comfort.
- Compliance & Certification Support: Select cabinets that provide proper validation documentation, service access, and support for annual recertification and audit requirements.
Frequently Asked Questions About Class II Biological Safety Cabinets
What does “Class II” mean in a biological safety cabinet?
Class II cabinets protect the user, the environment, and the product. They achieve this through HEPA-filtered laminar airflow over the work surface combined with inward airflow at the sash opening.
How do the Types A1, A2, B1, and B2 differ?
The primary differences involve exhaust configuration and chemical compatibility. Type A cabinets typically recirculate filtered air, while Type B cabinets are designed for 100% hard-ducted exhaust, especially for chemical or radioactive applications.
Can I use chemicals in a Class II BSC?
Only if the cabinet type is rated for chemical use. Type B2 cabinets are designed for volatile chemicals and radionuclides and must be fully ducted. Standard Type A1/A2 cabinets recirculate air and are not appropriate for most chemical applications unless exhausted properly.
How often must a Class II BSC be certified?
Class II BSCs typically require certification at installation, after relocation, and annually. Certification verifies airflow performance, filter integrity, sash alarms, and overall containment safety.
What workspace size should I choose?
Select a cabinet width and internal depth that accommodates your equipment, trays, and workflow. Consider posture, sash height, and required utilities when determining the right configuration.
