VDE 0400-22-1-2015 Workplace atmospheres - Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours - Part 1: General requirements and test methods; German version EN 45544-1:2015
VDE 0400-22-4-2000 Workplace atmospheres - Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours - Part 4: Guide for selection@ installation@ use and maintenance; German version EN 45544-4:1999
VDE 0400-22-4-2017 Workplace atmospheres - Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours - Part 4: Guide for selection@ installation@ use and maintenance; German version EN 45544-4:2016
VDE 0400-22-2-2015 Workplace atmospheres - Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours - Part 2: Performance requirements for apparatus used for exposure measurement; German version EN 45544-2:2015
VDE 0400-22-3-2015 Workplace atmospheres - Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours - Part 3: Performance requirements for apparatus used for general gas detection; German version EN 45544-3:2015