A cryogen-free option for continuous flow cryostats

The SuperTran product line has long been an industry standard for continuous-flow cryogenic systems. With the addition of an RGC4 Series recirculating gas cooler, these cryostats can be cooled without the need for liquid cryogens.

A closed loop of helium gas is cooled by a cryocooler, and the cold helium gas travels to the cryostat through a flexible vacuum-insulated transfer line. The gas cools the sample mount and thermal radiation shield before returning to the cryocooler for continuous recirculation. Samples can be changed without warming up the RGC4, allowing fast turnaround times. When paired with a ST-500 cryostat, the combination is an ultra-stable cryogenic microscopy platform, cooling samples and devices to below 4 K without the use of liquid helium.