Provides recommendations for the selection, installation and use of instruments and instrument systems utilizing electrical energy in hazardous areas or in the proximity of flammable substances. It deals exclusively with protection against hazards arising from explosive mixtures caused by release of flammable substances. It does not deal with hazards arising from dust flyings and fibres, increased hazards arising from oxygen-enriched atmospheres, or highly specialized hazards such as those arising from radio-induced sparks.
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