Liquid Helium and Liquid Nitrogen
VariTemp Cryostat Systems - Sample in Exchange Gas
Variable temperature cryostats with the sample located in a column of static exchange gas. These systems offer excellent temperature stability and are used with LHe and LN2 as needed.
The Janis Research VariTemp (VT-200) system is an exchange gas insert for use with Janis CNDT series dewars. The VT-200 offers an operational range of 4.2-77 K (LHe) and 77-300 K (LN2) with enhanced temperature stability for use in optical and non-optical experiments.
Sample in Exchange Gas
The VT-200 utilizes an exchange gas column to form an adjustable thermal link between the sample and the liquid cryogen. Output from a bifilarly wound heater on the sample mount is monitored and controlled by an automatic temperature controller to provide accurate sample temperature. Samples are located in the exchange gas column.
- Detachable tail dewar
- Electrical feedthrough port(s)
- Exchange gas manifold
- Safety pressure relief valve
- Temperature sensor
- System test
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