This technical report describes the instrumentation installed in the Antarctic geomagnetic observatory at the Italian base “Mario Zucchelli” and managed by INGV staff. The observatory continuously acquires measurements the Earth’s magnetic field in Antarctica since 1986. The measurements of the field components and its variations in Antarctica are very important for geomagnetic studies as it is close to the geomagnetic north pole and site of important magnetic phenomena such as the polar lights (Aurora), and interactions between the Earth’s magnetic field and the solar wind. Periodic absolute measurements are carried out by an operator to ensure the high quality standards of the observatory data. The geomagnetic instrumentation installed at the observatory is checked annually and periodically updated. The updates made during the latest research campaigns are detailed in this technical report.