| 1 | Rigid-wall Class III glovebox isolator | Maximum physical separation Fully enclosed, gas-tight or highly leak-tight chamber operated under negative pressure. | Typically −100 to −250 Pa relative to the surrounding room; project values vary. | Supply air commonly through HEPA filtration; exhaust normally through two-stage HEPA filtration or an equivalent validated system. | Interlocked pass-through chamber, dunk tank, or sealed transfer container. | Approximately 0.5–3.0 m² per work zone. | High-consequence pathogens, aerosol-generating procedures, and work requiring maximum operator separation. | Vaporized hydrogen peroxide, chlorine dioxide, formaldehyde alternatives, or another validated gaseous process. | Strongest separation between personnel, product, and room environment. | High capital cost, restricted access, and more complex maintenance and validation. |
| 2 | Flexible-film negative-pressure isolator | High containment Sealed flexible enclosure supported by a frame and maintained below room pressure. | Commonly −30 to −150 Pa, depending on enclosure design and risk assessment. | HEPA-filtered supply and exhaust; exhaust filtration should be monitored for pressure drop and integrity. | Glove ports, sealed transfer bags, rapid-transfer ports, or small pass-through chambers. | Approximately 0.4–2.5 m² per enclosure. | Temporary or semi-permanent containment, research procedures, and facilities needing deployment flexibility. | Vapor-phase hydrogen peroxide or another material-compatible validated method. | Fast installation and lower structural requirements than a rigid enclosure. | Film durability, puncture control, and compatibility with solvents or sharp equipment must be managed. |
| 3 | Rigid-wall negative-pressure research isolator | High containment Hard panels, sealed joints, glove ports, and monitored pressure differential. | Typically −50 to −200 Pa relative to the surrounding area. | HEPA or ULPA filtration selected according to the hazard, airflow pattern, and facility requirements. | Interlocked material airlock, RTP, or sealed container transfer. | Approximately 1–6 m², often modular. | Routine microbiology, sample processing, and repeatable laboratory workflows. | Vaporized hydrogen peroxide, chlorine dioxide, or surface disinfection combined with validated cleaning. | Good balance of durability, cleanability, and containment performance. | Requires careful airflow balancing and professionally qualified commissioning. |
| 4 | Pass-through production isolator | Process containment Separated personnel and material flows with controlled transfer interfaces. | Commonly −25 to −150 Pa for containment; positive-pressure designs are used only when product protection is the primary objective. | HEPA-filtered supply and exhaust, with pressure monitoring across critical filters. | Large interlocked pass box, rapid-transfer port, or automated transfer system. | Approximately 2–20 m² depending on batch and process scale. | High-throughput sample preparation, bioprocessing support, and controlled production operations. | Vaporized hydrogen peroxide or another validated room-and-equipment biodecontamination cycle. | Supports controlled logistics and reduces unnecessary personnel movement. | More complex utilities, automation, cleaning validation, and material-flow qualification. |
| 5 | Anaerobic microbiology isolator | Atmosphere-controlled containment Sealed enclosure with oxygen removal and controlled internal gas composition. | Usually slightly negative to neutral relative to the room; exact pressure depends on containment requirements. | HEPA-filtered gas supply and exhaust where biological containment is required. | Airlock with vacuum and gas cycling, or interlocked transfer chamber. | Approximately 0.5–2.5 m². | Anaerobic culture, oxygen-sensitive organisms, and controlled specimen handling. | Validated chemical or vapor decontamination compatible with the gas-control system. | Combines oxygen control with closed handling and reduced exposure risk. | Gas consumption, oxygen monitoring, and airlock cycle time add operational complexity. |
| 6 | Animal-handling biosafety isolator | Containment with husbandry access Enclosure designed for animal procedures, waste handling, and controlled airflow. | Typically −50 to −200 Pa, with airflow selected to control aerosols and animal-room exposure. | HEPA-filtered supply and exhaust; prefilters may be used to protect final filters from fur and bedding dust. | Interlocked animal transfer chamber, sealed cage transfer, or pass-through waste route. | Approximately 1–12 m² depending on species and housing configuration. | Small-animal infection studies, challenge studies, and procedures generating biological aerosols. | Hydrogen peroxide vapor, chlorine dioxide, or validated wet-cleaning and surface-disinfection protocols. | Integrates containment, observation, feeding, waste handling, and procedural access. | Noise, heat, animal welfare, waste loading, and cleaning requirements can be significant. |
| 7 | Aerosol-challenge isolator | Enhanced aerosol control Closed chamber designed to control, contain, and remove airborne biological material. | Often −100 to −300 Pa, subject to chamber size and aerosol-generation method. | High-efficiency exhaust filtration with monitored airflow; redundant filtration may be specified for higher-risk work. | Small airlock, sealed instrumentation ports, and controlled sample removal. | Approximately 0.5–4.0 m². | Aerosol exposure studies, inhalation research, and validated airborne-containment testing. | Validated vapor or gas decontamination, with special attention to internal tubing and hard-to-reach surfaces. | Designed around airborne-risk control and measurable airflow performance. | Requires specialized aerosol characterization, leak testing, and rigorous operational controls. |
| 8 | Cytotoxic or high-potency compound isolator | Operator and product protection Normally negative pressure when hazardous powders or aerosols are handled. | Commonly −30 to −150 Pa; pharmaceutical applications may define tighter site-specific limits. | HEPA-filtered supply and exhaust; filter selection must consider powder loading and chemical compatibility. | Rapid-transfer port, pass box, or sealed bag-in/bag-out arrangement. | Approximately 0.5–6.0 m². | High-potency biological materials, cytotoxic compounds, and sterile or low-bioburden operations. | Validated hydrogen peroxide vapor or residue-compatible chemical cleaning. | Provides controlled handling of hazardous powders, liquids, and contaminated disposables. | Biological containment and chemical containment requirements must be assessed separately. |
| 9 | Dual-chamber transfer isolator | Material-flow containment Separate entry and exit chambers reduce cross-contamination and uncontrolled transfer. | Typically −25 to −150 Pa in the main chamber; transfer chambers may use staged pressure control. | HEPA-filtered supply and exhaust, often with independent monitoring for each chamber. | Two-door interlocked pass-through with configurable purge cycles. | Approximately 1–8 m². | Frequent sample movement, multi-step workflows, and facilities requiring directional material flow. | Vapor-phase decontamination, wipe-down disinfection, or both. | Reduces transfer-related contamination and supports efficient workflow separation. | More doors, sensors, interlocks, and controls increase maintenance and qualification demands. |
| 10 | Mobile or relocatable biosafety isolator | Flexible containment Compact enclosure mounted on a movable frame or designed for rapid relocation. | Typically −30 to −150 Pa, depending on the enclosure and exhaust arrangement. | HEPA-filtered supply and exhaust; exhaust connection must be compatible with the host facility. | Small pass-through, sealed transfer bag, or glove-port loading method. | Approximately 0.3–2.0 m². | Overflow capacity, field laboratories, temporary projects, and facilities with changing layouts. | Hydrogen peroxide vapor or validated manual disinfection, subject to enclosure materials. | Shorter deployment time and lower dependence on permanent construction. | Limited workspace, utility capacity, exhaust routing, and payload compared with fixed systems. |