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. The helium transfer tube is an ultra low loss gas shielded transfer tube. The helium flow is controlled via a needle valve which is located in the lower part of the transfer tube that is immersed in the liquid helium tank.
Automated versions are available upon request.