Deflagration Flame Arrester with Weather Hood provides protection against flame transmission through atmospheric deflagaration and short time burning on the flame arrestor element. The Flame Arrester is provided with weather hood which provides protection against environmental impact. The Deflagration Flame Arrester is equipped with a temperature sensor which immediately detects a flame on the surface. Deflagration Flame Arrester with Weather Hood is suitable for elevated operating temperatures and can be easily maintained.