DIN EN 60079-29-2 VDE 0400-2:2008-07

Explosive atmospheres

Part 29-2: Gas detectors – Selection, installation, use and maintenance of detectors for flammable gases and oxygen

DIN EN 50073 VDE 0400-6:2000-04

Gudie for selection, installation, use and maintenance of apparatus for the detection and measurement of combustible gases or oxygen;