Back in 1979, Sea Marconi was the first private company in Italy to realise the importance of performing dissolved gas testing ( DGA - Dissolved Gas Analysis) for diagnostic purposes. The gases in the insulating fluid in electrical transformers are an important indicator of their conditions, and of the presence of potential fault conditions. By analyzing the presence of, and relationship between, the dissolved gases in the oil is possible to identify elements such as hot spots, electrical arcs, atypical degradation of compressed cardboard insulation, and intervene in time in order to avoid breakdowns and costly machine down time.

Interpreting dissolved gases (DGA) test results is a very delicate, specialised activity, which requires, above all, knowledge of the applicable standards (principally IEC 60599), extensive experience in this field, and advanced, efficient laboratory instrumentation. Every year, Sea Marconi performs over 5,000 dissolved gases (DGA) measurements, guaranteeing a level of absolute excellence that is regularly confirmed by international inter-laboratory tests (known as proficiency tests or round robin tests). And that's not all: as of 2010 Sea Marconi joined the very small number of laboratories at Italian or European level to be accredited to carry out dissolved gas testing by Accredia, the national laboratory accreditation body

Thus, in addition to providing a service that is independent from oil and transformer manufacturers, and repair organisations, Sea Marconi also offers almost unparalleled levels of expertise in this field.