The Buchholz Relay complies with EN 50216-2, is available for different pipe sizes (25, 50 or 80 mm), connections (threads, round or square flange) and oil flow rates depending on the size and the design of the transformer. The signaling connection scheme is also eligible for two or four contacts, normally open or changeover type. Diecast aluminum housing with UV-resistant C4 powder coating (C5-M available under request) with protection degree IP65 for the highest level of UV and corrosion resistance. An optional gas sampling device is available to be installed at ground level for easier gas sampling.