Method and device for continuous monitoring of gas dissolved in oil

The invention relates to a method and a device for continuous monitoring of gas dissolved in oil and comprises placing a separator cell (1) in a conduit which extends from the upper part of an oil-cooled transformer and which is connected to the lower part of the transformer tank. The interior of the separator cell is divided by means of an inner glass filter (3) into two parts, and the oil which flows through the separator and the glass filter is collected in the lower part of the separator. Through a pump (10) connected in the conduit from the separator to the lower part of the transformer tank, the oil level of the collected oil is maintained at a constant level. Between the glass filter and the collected oil, a gas compartment (5) is formed which contains gases, extracted from the oil, with a composition and concentrations uniquely determined by those gases dissolved within the oil. A gas sensor (6) is connected between the upper and lower parts of this compartment.