In mid-2021, ILTSR PAS received from the Jagiellonian University brand new elements of the Kelvinox MX50 system by Oxford Instruments. The team of the Low Temperature Physics Laboratory, after agranging the necessary adapters to integrate the system with the infrastructure of the laboratory, assembled and started up the Kelvinox MX50 3He-4He dilution refrigerator. The base temperature T = 30.1 mK, as declared by the manufacturer, was reached already at the first start-up.