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Standard cell phones do not meet the international safety standards for use in hazardous areas. Intrinsic safety is one of several methods used to ensure worker safety while using electrical appliances and equipment in gaseous hazardous area. For standard everyday use cell phones the added cost of meeting these standards would massively increase the cost of the handsets and, because the standard defines various levels of gas hazard it would be impossible to educate all users as to what is safe and what is not each hazard area.

The hazardous goods industry including all of the major chemical and petrochemical manufacturers and refiners operating in developed countries apply one or more of the various international safety standards. This is either by regulation from worker safety bodies or by the individual company's own OH&S regulations.

International standards for "explosion protection" provide technical standards and methods of testing for all electrical equipment used in hazardous areas where it may, through either design or fault or malfunction cause a spark or "hot spot" which would be capable of igniting the types of gases in the area.

The explosion protections standards used in Europe are from the International Electrotechnical Commission and enforced and regulated through the Government mandated ATEX regulations. The approvals are based on meeting typically either the IEC standards (IECEx) or Cenelec Standards. These standards are also now commonly accepted in the USA where section 500 of the National Electrical Code regulates and defines compliance. Other standards typically accepted in the world are from Underwriter's Laboratories or Factory Mutual (USA) as well as CSA (Canadian Standards).

Intrinsic safety is one of 9 methods of explosion protection. Intrinsic safety infers that the unit is "intrinsically safe", i.e. it cannot cause an unsafe situation due to it design. The design criteria typically demands multiple (sometimes triple, depending on the application) layers of electrical protection (safety barriers) to allow multiple faults to occur in the unit and yet still allow compliance. Other type of protection, often mistakenly called "intrinsic safety" include encapsulation, oil filled and enhanced protection, Ex e.

Very often we hear the myth busters type comments of "we can't make it ignite the gas". These safety standards go one step further than the typical uneducated and/or unscientific approach and take into account faults and fault tolerances, and provide multiple layers of protection against such occurrences.

Major manufacturers of explosion protected equipment are: Cell phones are available from Ex Technology www.dcaexpro.com (Australia) and Ecom Instruments www.ecom-ex.com(Germany). Other intrinsically safe hardware is available from such reputable manufacturers asPepperl & Fuchs www.pepperl-fuchs.com (Germany) Crouse Hinds www.crouse-hinds.com/ (Germany) , MTL Instruments www.mtl-inst.com (UK). There are also a lot of unscrupulous fringe suppliers who infer compliance so be be careful. Buy from the manufacturer to ensure safety. It is easy for unscrupulous suppliers to put some labels on a handset and call it safe.

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14y ago
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14y ago

I think they are good phones. I now own a Storm and love it.

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