Bio Safety Cabinet Class IIA2 These biological safety cabinets offer a patent-pending design with the following features:Nominal inflow velocity of 105 fpm (0.5 m/sec)Nominal down flow velocity of 55 fpm (0.3 m/sec)Approximately 70% air recirculationInterior-mounted, line-of-sight LCD information center with "Filter Life Remaining" bar graph, status line for alarm conditions and alerts to warn when filter life diminishes to 20%, 10% and 0%; filter monitoring system consisting of an electronically commutated motor (ECM) that delivers a precise volume of air as required and automatically adjusts as filters load without relying on airflow sensors.Smart-Start System that allows the user to program start up and shut down operations.Night-Smart System that idles the blower when the sash is fully closed; built-in interval or elapsed timer for experiment monitoring, fluorescent light or UV light control (on models with UV light).Touchpad control on right-hand side post for manual activation of blower, light, timer, audible alarm mute and menu selectionRadiused type 304 stainless steel interior and removable, seamless, dished work surface with lift out knobs Epoxy-coated steel exteriorTowel catch located under work surfaceContain-Air Negative Pressure ChannelClass 5 conditions per ISO 14644-1 and 2Supply and exhaust 99.99% efficient HEPA filtersTwo electrical duplex receptacles (single outlets on 230 volt models), located one on each side, with ground fault interruption (115 volt models) and stainless steel splash covers; fully-closing, clear 1/4" tempered safety glass sash with two sash handles, counterbalanced, anti-racking mechanism and 10 degree slope.21.7" (54 cm) maximum sash opening height and 27.0" (69 cm) viewing height.Curved stainless steel inlet grille with Reserve-Air Secondary Airflow SlotsBright, 90-100 footcandle, glare-free fluorescent lighting located outside the contaminated work areaIntrinsically safe negative pressure designAutomatic shut-down should remote blower fail (remote blower not included)Electronic security lock (optional activation) that requires code to operate the cabinet10' (3 m) power cord with plug; full three year warranty on parts and service.