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Australian Standards for Gas Detection /EX Equipment

DESIGN OF EQUIPMENT
AS/NZS 60079.29.1:2008 : 
Explosive atmospheres - Gas detectors - Performance requirements of detectors for flammable gases
Specifies general requirements for construction, testing and performance, and describes the test methods that apply to portable, transportable and fixed apparatus for the detection and measurement of flammable gas or vapour concentrations with air. The apparatus, or parts thereof, are intended for use in potentially explosive atmospheres and in mines susceptible to firedamp.
INSTALLATION
AS/NZS 60079.29.2:2008 : 
Explosive atmospheres - Gas detectors - Selection, installation, use and maintenance of detectors for flammable gases and oxygen
Specifies general requirements for construction, testing and performance, and describes the test methods that apply to portable, transportable and fixed apparatus for the detection and measurement of flammable gas or vapour concentrations with air. The apparatus, or parts thereof, are intended for use in potentially explosive atmospheres and in mines susceptible to firedamp.
HAZARDOUS AREA CLASSIFICATION
AS/NZS 60079.10:2004 : 
Electrical apparatus for explosive gas atmospheres - Classification of hazardous areas (IEC 60079-10:2002 MOD)
Specifies the classification of hazardous areas where flammable gas or vapour risks may arise, in order to permit the proper selection and installation of apparatus for use in such hazardous areas.
OTHER
AS/NZS 60079.20:2000 : 
Electrical apparatus for explosive gas atmospheres - Data for flammable gases and vapours, relating to the use of electrical apparatus
Data for flammable gases (ie gas groups and temp classes, LEL,UEL, etc)

This technical report gives guidance on the selection of appropriate electrical apparatus, protected by flame-proof enclosure or designed to be intrinsically safe, according to the gas or vapour in which it is intended to be used.