Explosion-proof and intrinsically safe

摘要

The design of an explosion-proof tester, device or unit is such that any explosion that is caused by a flammable gas entering the device is contained within it and does not leave the casing, to prevent an internal spark from causing a much larger explosion. The case itself is tested to ensure that it would not heat up sufficiently to ignite any surrounding gas. Explosion-proof devices are usually large, heavy and made from stainless steel or cast aluminium. Intrinsically safe means that any electronic device or wiring will not have the power or potential to cause any type of spark or arcing. Intrinsically safe devices such as process calibrators cannot produce a surface temperature high enough to cause ignition.