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FUME HOODS AND SAFETY CABINETS

Fume Hood Vs Biological Safety Cabinet?

Fume hoods are ventilated enclosures that remove volatile vapors and hazardous chemical fumes from the laboratory, providing personnel protection only.

Biological safety cabinets (or biosafety cabinets) utilize HEPA filters to provide personnel environmental and/or product protection. They can recirculate or exhaust filtered air, depending on your application, and are suitable for work with hazardous particulates like bacteria and viruses.

Biosafety cabinets and fume hoods are both sometimes referred to as "hoods," but are two completely different categories of laboratory equipment. Both are laboratory equipment built to safely handle the hazards for which they're particularly designed, but they differ in terms of the precise type(s) of protection provided, airflow and suitable applications.

When selecting a "hood" for a laboratory, below are some key points for consideration. Note that improper selection or use of equipment can yield significant consequences for health and safety, so always consult your safety officer for recommendations based on your specific application.

Protection

Knowing what type of protection you will require is the first step in selecting the proper laboratory enclosure. Biosafety cabinets provide environmental, personnel and product protection, while fume hoods provide only personnel protection.

Airflow

Fume hoods handle hazardous chemicals (see Applications below), air is drawn away from the laboratory worker beginning at the face of the equipment, across the work surface and through ductwork where it is diluted and released into the atmosphere. Proper and undisrupted airflow is critical within a fume hood; do not store large equipment inside the hood or do anything that could otherwise impact the circulation of air within the hood. To maintain a safe and efficient work environment, never put your head inside the hood and keep the sash closed as much as possible.

Biosafety cabinets

Three classes of biosafety cabinets (see Variations below) all have one feature in common: HEPA filtration.

Class I biosafety cabinet, air is drawn away from the laboratory worker and across the work surface.

Class II biosafety cabinet, intake air is drawn safely around the operator, sterile air flows downward onto the work surface and exhaust air is HEPA filtered before it is either recirculated into the laboratory or released into the atmosphere through ducting.

Class III biosafety cabinets are gas-tight enclosures, with both intake air and exhaust air passing through HEPA filtration.

Applications

Fume hoods: Chemical fume hoods can handle the following: toxic gases, odorous materials, reactive materials, chemicals that can spatter, aerosols, carcinogens, flammables or other toxic and volatile materials.

Biosafety cabinets: Biosafety cabinets provide a safe environment for research involving infectious microorganisms or other hazardous particulates. Depending on the type of cabinet (see below), these enclosures are suitable for use with agents requiring containment in conjunction with Biosafety Level (BSL) 1, 2 or 3. (Note that Class III cabinets can accommodate BSL 4 agents. Class II cabinets can accommodate BSL 4 applications with proper personnel protective equipment.)

Variations

Fume hoods: By-pass chemical fume hoods are the most common type, operating at a constant air volume. Auxiliary-air, reduced air volume and high performance fume hoods all fall under the by-pass chemical fume hood umbrella. High performance hoods operating on a variable air volume (VAV) system are the most efficient. Hoods exist for special circumstances as well, such as those particularly suited to handle perchloric acid these are constructed of acid resistant materials and radioactive applications come with extra decontamination features and often require filters in the ducting.

Biosafety cabinets: Class I biosafety cabinets have an open front, operate under negative pressure and do not provide product protection.

The most common types of biosafety cabinets, Class II, fall under two main categories—Type A or Type B. Class II, Type A cabinets recirculate air back into the laboratory unless they are canopy connected to the outside as required by the application (work with odorous materials). Class II, Type A1 and A2 cabinets are similar yet separated by the minimum average inflow velocity (fpm) required, and neither type can handle work involving radionuclides or volatile chemicals.

Class II, Type B cabinets, on the other hand, are hard ducted to laboratory exteriors and are suitable for work with only tracer amounts of these more harmful substances if required by the microbiological studies being performed in the interior of the equipment. Class II, Type B1 biosafety cabinets recirculate a percentage of air back into the laboratory while Class II, Type B2 cabinets are entirely hard ducted and expel all air. Class III biosafety cabinets are completely enclosed and feature attached rubber gloves.
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  • FH(P) series Fume Hood - Global Scientific Ltd
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    FH(P) series Fume Hood
    £5,000.00
    £5,000.00
    "                       LED Display                                                           Waterproof Socket                                  PP sink                                            ...
  • FH(X)series Fume Hood - Global Scientific Ltd
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    FH(X)series Fume Hood
    £5,000.00
    £5,000.00
    "LED Display Water & Gas Tap Water Sink Foot Switch Observation Window Back Side Air Compensation Advantage 1. UV Lamp for sterilization. 2. Motorized front glass window. 3. Adjustable a...
  • Mobile Fume Extractor - Global Scientific Ltd
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    Mobile Fume Extractor
    £5,000.00
    £5,000.00
    "Features: 1. Freely moving, easy to operate and install. 2.The purification system consists of fan, primarily efficient filter, high efficient filter and activated carbon filter. 3.HEPA filter ens...
  • Necessary Test Tools for Biosafety Cabinet - Global Scientific Ltd
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    Necessary Test Tools for Biosafety Cabinet
    £5,000.00
    £5,000.00
    1.Airflow Tester Specifications:         Power supply: 220 AC  50/60HZ ; 110V, 60HzInput power: 30w  Fuse: T2A L (￠5×20)Work style: Intermittent working≤15 minMaximum atomization velocity: 1.5 ml/m...
  • Necessary Tools for Filter Replacement - Global Scientific Ltd
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    Necessary Tools for Filter Replacement
    £5,000.00
    £5,000.00
    1. Formalin Fumigation Sterilizer Sterilize the cabinet with formalin for 8 hours Model: FX-100 Power supply:220V/50Hz Power: 180w        Volume:100ml   2. Ammonium Hydrogen Carbonate Neutralizer...
  • NSF Certified Biological Safety Cabinet - Global Scientific Ltd
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    NSF Certified Biological Safety Cabinet
    £5,000.00
    £5,000.00
    Details:                              LCD Display                                                              Front Window Large LCD display is easy to monitor all the safety  parameters at a gla...
  • NSF Certified Biological Safety Cabinet (New Product) - Global Scientific Ltd
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    NSF Certified Biological Safety Cabinet (New Product)
    £5,000.00
    £5,000.00
    Advantages: 1. Motorized front window.2. Large LCD display, all information displayed.3. Automatic air speed adjustable with filter block.4. With memory function in case of power-failure.5. Side &a...
  • Vertical Laminar Flow Cabinet - Global Scientific Ltd
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    Vertical Laminar Flow Cabinet
    £5,000.00
    £5,000.00
    " TECHNICAL PARAMETERS:  Model  BBS-V680 BBS-V800  BBS-DDC  BBS-SDC  External Size (W*D*H), mm 680*410*1160  802*650*1550  1040*615*1770  1440*615*1770  Internal Size  ...
  • Vertical Laminar Flow Cabinet-Double Sides Type - Global Scientific Ltd
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    Vertical Laminar Flow Cabinet-Double Sides Type
    £5,000.00
    £5,000.00
    "TECHNICAL PARAMETERS  Model  BBS-DSC  BBS-SSC  External Size (W*D*H)  1040*660*1770mm  1440*660*1770mm  Internal Size (W*D*H)  940*560*545mm    1340*560*545mm   Work S...
  • Walk-in Fume Hood - Global Scientific Ltd
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    Walk-in Fume Hood
    £5,000.00
    £5,000.00
      ADVANTAGE 1.    Operators are available to walk into the fume hood to operate if need. 2.    Large room exhaust system, suitable for large laboratory instruments and equipment.   MODELS: Mo...

Showing 25 -34 of 34 items