The HYDROCAL 1011 genX P is a portable device for the analysis of dissolved and free gases from the isolation fluid of oil-filled power transformers and other electrical equipment. It individually measures moisture in oil (H2O) and the key gases hydrogen (H2), carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), acetylene (C2H2), ethylene (C2H4), ethane (C2H6), oxygen (O2), nitrogen (N2) and propane (C3H8) dissolved in transformer oil.

As hydrogen (H2) is involved in nearly every fault of the insulation system of power transformers and carbon monoxide (CO) is a sign of an involvement of the cellulosic / paper insulation the presence and increase of the other light-weight ydrocarbon gases further classifies the nature of a fault as overheating, partial discharge or high energy arcing. Oxygen (O2) can be a sign of excessive ageing or leakages of the sealing of hermetic transformers.