In conditions where there are temperature fluctuations and moisture, the Series 781 metal Ex e breathers protect electrical wiring from the effects of condensation inside the enclosure. They ensure continuous pressure equalisation between the inside of the enclosure and the external environment. Two metric and two NPC thread versions are available for this purpose. An integrated connection thread seal and a special fixture nut are included in the standard version. They have global certification according to IECEx, ATEX and cCSAus.