Gelaire BH-EN and UltraSafe Class II biological safety cabinets provide protection for personnel, environment and products in work with microorganisms of Risk Groups 2 and 3.
Cabinets provide protection by creating an air barrier at the work opening, recirculating HEPA-filtered laminar airflow downwards through the work zone and by HEPA filtration of exhaust air.
Limitations These cabinets are intended only for handling biological materials which can be inactivated by a decontamination procedure such as that described in AS 2252 Part 4.
An increasing number of animal studies involve the use of cytotoxic drugs and some of this work has been carried out in Class II cabinets. These cabinets are unsuitable for use with cytotoxic drugs, because aerosols recirculated within the cabinet contaminate fans and internal plenums, thereby exposing service personnel to contaminated surfaces.
For applications involving cytotoxic drugs or other potentially-toxic compounds requiring sterility and containment, Gelaire CytoFast cytotoxic drug safety cabinets complying with AS 2567 should be specified.
Airflows and Protection
Cabinets are part-recirculating laminar airflow enclosures with separate H14 HEPA filter systems for exhaust and laminar airflow.
Personnel and environment protection is provided by an air barrier at the work opening and HEPA filtration of exhaust air. Inflow of ambient air into a full-width grille in the work opening creates the air barrier. A quantity of air equal to the barrier inflow is exhausted to the room through the exhaust filter. Vertical laminar airflow recirculated within the work zone through a second HEPA filter maintains a sterile environment for product protection.
All potentially-contaminated zones within the cabinet that operate at positive pressure are surrounded by zones of negative pressure relative to the laboratory. This â€˜biodynamicâ€™ sealing system ensures that airborne contaminants are kept within the cabinet and captured by the HEPA filters.
BH-EN hinged-window cabinets embody the latest European control and HEPA filtration technology, together with class-leading ergonomics and functionality. A microprocessor-based monitoring system automatically controls all functions and safety alarms. Cabinets may be installed on laboratory benches or on optional Gelaire floor stands. Width options are 900 mm, 1200 mm, 1500 mm and 1800 mm; with the option of exhaust discharge at the top or right hand side. Left hand exhaust is available to special order.
UltraSafe electric sash-window cabinets have the same general specification and performance as BH-EN cabinets, but with glass side panels, an electrically-operated sliding window and exhaust discharge on the top. The window can be raised to a maximum opening of 420mm for cleaning or movement of materials; or completely closed, obviating the need for a work zone closure panel.
ECSÂ® control and energy management the new ECSÂ® (Eco Control System) microprocessor employs the latest technology for integrated management of airflows and filtration. Self-regulation of airflows compensates for gradual loading of filters, while restoring power balance. Combining AC fans and certified low pressure-drop filters, the ECSÂ® system optimises power consumption, thereby reducing CO2 emissions into the environment.
Safety & operational features
Eco® Control System optimises energy consumption
Fans automatically adjust to maintain safe airflows
Constant monitoring and reporting of all operating functions in an illuminated LCD
Display of laminar flow and air barrier velocities, operated by sensitive anemometers
Selectable display of:
Internal and external temperature
Hours of operation
Fan power factor
Scheduled filter lifetime
Speed-reduction ’standby’ mode allows continuous operation with power saving
‘Blackout’ reporting if power supply to the cabinet fails while the user is absent
Audible and visible alarms indicate window malposition, out-of-range airflows or any other malfunction
Independent testing and certification
Gelaire safety cabinets are tested and certified on-site, prior to use by an independent NATA-registered testing laboratory.
Robust, gastight housing with Dupont AlestaR antimicrobial powdercoat paint finish using environmentallysustainable silver ions to resist growth and spread of microbes
304 stainless steel (SS) work zone
316 stainless steel work tray for increased corrosion resistance
H14 minipleat HEPA filters with protective hydrophobic membrane on work zone filter
Cabinets are designed and manufactured according to the directions on ergonomics in ISO standard 14738
Flat air barrier grille integrated into the work tray without ledge or joint
Hinged window easily opened and closed by gas springs (BHEN)
Silent, smooth electric sash window (UltraSafe)
Touch operation of control panel
Noise level in situ typically < 60 dB(A) with ultralow vibration
Solenoidcontrolled gas tap (on RHS)
Vacuum tap (on RHS)
Splashproof power outlet (on RHS)
Additional LHS power outlet on UltraSafe 215D and US 218D
Germicidal UV lamp with two programmable timer modes
Closure panel for work opening (BHEN)
Window closes fully (UltraSafe)
Accessories and options
Top, RHS or LHS exhaust (BHEN)
Fixedheight floor stand
ErgoLab height adjustable electric floor stand
Additional splashproof power outlet in work zone on LHS (standard on UltraSafe 215D and 218D)
Activated carbon exhaust filter
Armrests for work surface (UltraSafe)
Inflatable window seal for fumigation (UltraSafe)
Biological safety cabinets should be installed in accordance with AS 2252 Part 4, with particular attention to selecting locations away from sources of air movements such as doorways, passageways, air diffusers and exhausts that could influence cabinet airflows A comprehensive Gelaire manual is available to assist with cabinet installations.
BH-EN with hinged window
Window opens fully for cleaning or materials access
Vacuum and gas taps, power outlet, programmable germicidal UV standard fitting
Work zone closure panel
Top or side exhaust
Overall Dimensions (mm)
Workzone Dimensions (mm)
Work Opening Height: 200 mm
Air Barrier Test Method: AS 1807.22
UltraSafe with electric sash window
Smooth, electric sash window
Glass side panels
Window closes fully – no separate cover
Vacuum and gas taps, power outlet, programmable germicidal UV standard fittings
Overall Dimensions (mm)
Workzone Dimensions (mm)
Work Opening Height: 250 mm
Air Barrier Test Method: AS 1807.26
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