It was in cooperation with the Federal Health Office, Berlin, and the Institute for Water, Soil and Air Hygiene that the first dust measurement unit was developed to determine particulate concentrations in outdoor air. It has been adopted as the standard procedure in legal specifications and in the VDI Guidelines and the Air Quality Regulations. The LVS 3 low-volume sampler has been continuously refined over time and in 1999 the corresponding accessories were adopted as reference units in the appropriate European directives. This low-volume sampler is a market leader. The product line has been continuously expanded beyond the low-volume sampler used as a reference unit as per CEN standards. The range now includes, for example, complete sampling systems and measurement instruments for direct and continuous analysis of the particle concentrations in the atmosphere.
In the years 1999 and 2000 the company was certified as per the DIN EN ISO 9001 quality assurance standards. In 2002 the quality management system was audited to the requirements set forth in DIN EN ISO 9001:2000. The Norbert Derenda Engineering Office has, since the year 2000, also been a member of the Sponsors’ Circle for the Commission on Air Quality Maintenance (KRdL) in the VDI and DIN organizations.
In October of 2007 Norbert Derenda was appointed to membership in “KRdL Working Group 4/2/09 on Measurement of Particles in Outdoor Air”.
The firm’s products are being used to an ever increasing extent within the European Union to monitor outdoor air quality. The company employs highly competent and dedicated associates who can also be set to work on special solutions and custom equipment at any time. The company has manufacturing agreements with four other companies, located inside and outside Germany. The sister organization is the COMDE GmbH, specializing in measurements of pressure and gas density. Norbert Derenda is the proprietor and CEO at that company, too. Facilities were erected in Stahnsdorf, near Berlin, in July of 2007. All the activities of both companies are now concentrated here. In September of 2011, Ingenieurbüro Norbert Derenda and COMDE GmbH merged into the Comde-Derenda GmbH.