X-Band waveguide-type cavities are mounted to the liquid helium cryostat (see right), while the sample is inserted into the quarz dewar. Therein, it is held in a steam of temperature controlled helium gas. Sample exchange at any temperature is a standard feature of this system.
The digital helium control unit monitors and controls the temperature measured with a thermosensor close to sample's position. It features PID temperature control (proportional, integral and derivative). The control unit is fully remote controlable via the acquisition software Xepr or WinEPR Acquisition of the ELEXSYS and EMX spectrometer series.