Classified ‘hazardous areas’ have a potentially flammable and/or explosive atmosphere. Because a fire or explosion in such circumstances would likely be catastrophic – causing loss of life or serious injury and wiping out a business – it is crucial to have in place a suitable fire detection and protection solution which adequately addresses the specific hazard profile and associated fire risks.

To ensure the high level of safety demanded in hazardous areas, two universally accepted methods of classification have been adopted: one is commonly known as Class/Division/Group, used in North America and based on NEC 500/504 (NFPA 70 [1]). The other is known as Zone/Group and is used in Europe based on IEC 60079 [2]. While hazardous areas are termed differently, the fundamental are the same, being based on the atmospheric hazards of gas, dust and fibres.

Whichever classification system you follow, fire detection needs to be highly sensitive and reliable. Additionally, the system often has to be robust enough to survive in a tough environment; not be a spark or ignition risk itself; and ideally allow for minimal maintenance in the danger zone. Securiton offers a wide variety of options for detection in hazardous areas, including Atex-rated devices for installation in the classified zone and options for ‘intrinsically safe design’ where the main console is located remotely.