This standard gives requirements and the corresponding test/assessment methods applicable to leak detection kits based on the drop of the liquid level in the leak detection kits header tank. Leak detection kits are intended to be used with double skin, underground or above ground, non-pressurized, tanks designed for water polluting liquids. The kits are usually composed of: ¾ð sensing device; ¾ð evaluation device; ¾ð alarm device.