Environmental Monitoring Systems Automatic weighing system (AWS) for gravimetric evaluation of dust-loaded filters with a diameter of 150 mm Type AWS-2 Automatic weighing system without protection hood Comde-Derenda GmbH Kieler Strasse 9, 14532 Stahnsdorf / Germany [email protected] www.comde-derenda.de

Environmental Monitoring Systems Automatic weighing system (AWS) used to weigh dust-laden filters with a diameter of 150mm for registration and documentation of particulate matter (Pat. pend.) The automatic weight determination system (AWS) registers and documents the amount of particulate matter in outdoor air in compliance with the EN 12341:2014 (PM10and PM2,5) standards. The particulate matter is collected on filter media with a filter diameter of 150 mm mounted in volume samplers in combination with specimen sampling systems. ■ Very exact, automatic weight determination system for filters...

Environmental Monitoring Systems Introduction of the automatic weighing system Filter magazine Several European Union directives require that the particulate matter present in outside air be measured. In most cases reference units (low-volume samplers) are used for this purpose. A vacuum pump is used to draw particulate-laden air into the device, the particulates are sorted by size in separation stages (impactors) and the dust particles thus recovered are deposited on a filter. In the past, the amount of dust thus collected was ascertained by manual weighing at an outside laboratory. Where non-continuous...

COMDE DERENDA The anodized aluminum mounting rings are fitted with support screens upon which the filters lie. These are gold-plated, glass fiber reinforced epoxy resin base panels (FR4). The gold plating serves primarily to equalize the electrical potential but also makes the contact surfaces easy to clean. What’s more, the plating eliminates any interaction between the filter and the support, thus preventing contamination. Before the sampling cycle starts, the clean filters are placed in support rings. This assembly is fitted in the magazine towers and provided with a code for later identification....

Environmental Monitoring Systems Evaluation and documentation Information on the filter materials The supplied evaluation software can be used to postprocess the data stored in databases or in an Excel spreadsheet. Custom modifications can be provided as extra-cost options. In addition to the data mentioned above, the weights of the non-laden and laden filters will be stored after the weighing process is completed. The following filter materials can be weighed with the AWS-2: • Glass fiber filter • Quartz fiber filter Reference magazine configuration menu Block diagram AWS-2 Comde-Derenda GmbH...

COMDE DERENDA Comde-Derenda GmbH Kieler Strasse 9, 14532 Stahnsdorf / Germany [email protected] www.comde-derenda.de

COMDE DERENDA Technical Data Automatic Weighing System Type AWS-2 Filter magazine Number of magazine towers holding filters: Number of filters / magazine tower: Material of magazine discs: Potential equalization: Drive system of the disc magazine: Positioning of the disc magazine: Filter Filter material: Filter diameter: Filter marking: Position of marking: Dimension of marking: Type of marking: Reader station: Microbalance Manufacturer: Reading precision (resolution): Maximum load: Location of microbalance: Data output Data output: Data export (CSV data file): (other data formats on customer...

Environmental Monitoring Systems Comde-Derenda GmbH in Stahnsdorf bei Berlin Comde-Derenda GmbH was originally founded as an engineering office in Berlin, in the year 1972. The company’s activities at that time included the development, production and sales of measurement and control systems and gas analysis systems. Over the course of time the engineering office focused on the development and production of devices and systems for the collection of particulates in the ambient air, used in the field of environmental protection. COMDE GmbH was founded in the year 1992. The company in particular...