German standard methods for the examination of water, waste water and sludge; bio-assays (group L); determining the tolerance of green algae to the toxicity of waste water (Scenedesmus chlorophyll fluorescence test) by way of dilution series (L 33)
Edition 1991-03

Water supply - Requirements for systems and components for the storage of water; German version EN 1508:1998
Edition 1998-12

Measurement of airborne noise emitted by machines; enveloping surface method; continuous handling equipment
Edition 1988-06

Technical specifications for centrifugal pumps - Class I (ISO 9905:1994)
Edition 1997-03

Respiratory protective devices - Self-contained closed-circuit breathing apparatus for escape - Requirements, testing and marking; German and English version prEN 13794:2021
Edition 2021-02

Class A and class B concrete elements and buckets for gullies; Design; installation and assemblies
Edition 1981-11

Timber structures - Structural timber and glued laminated timber - Determination of some physical and mechanical properties; German version EN 408:2010+A1:2012
Edition 2012-10

Milking machine installations - Vocabulary (ISO 3918:2007)
Edition 2010-01

Environmental management systems - Guidelines for using ISO 14001 to address environmental aspects and conditions within an environmental topic area - Part 2: Water (ISO 14002-2:2023); German version EN ISO 14002-2:2023
Edition 2023-12

Drain and sewer systems outside buildings - Management and control of activities - Part 4: Control of inputs from users; German version EN 14654-4:2021
Edition 2022-12