Don Whitley H35 Hypoxystation -
Whitley Workstations HEPA Filtration No need to filter incoming gas supplies. Clean-up time after a period of activity is considerably less than the 20 minutes allowed by the standard. Rather than use ‘off-the-shelf’ filters, the Whitley HEPA Filtration System uses filters designed specifically for the product in conjunction with one of the world’s leading filter manufacturers. Don Whitley Scientific (DWS) can now offer the unique Whitley Internal HEPA Filtration System to provide a high degree of product/ sample protection on modified atmosphere workstations. HEPA fitted workstations are ideal for use as part of a pharmaceutical manufacturing process, for the cultivation of slow-growing anaerobes, or for applications requiring complex manipulations under anaerobic conditions (ie biochemical assays). Proof of atmospheric cleanliness can be provided on request. Using innovative circulation technology, all the atmosphere in the chamber passes through the filter every four seconds, quickly creating and maintaining a particle-free environment (tested down to 0.3µm – exceeding ISO 14644 Class 3, as referenced in the Cell Tissue Culture Directive, or Class 1 of US Federal Standard 209E). Unlike some other systems, DWS integrates the filter within the workstation. Because the warm, moist atmosphere isn’t pumped to an external filter, the filter does not become saturated with condensate and thus rendered ineffective. Although DWS workstations are positive pressure devices, this HEPA filtration system provides the highest known level of atmospheric cleanliness of any positive pressure modified atmospheric workstation. Tests have determined that aerosols of bacterial cells and spores are trapped by the system, thereby preventing the contamination of any media present in the workstation. www.dwscientific.co.uk
