VariTemp (VT-200)
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VariTemp (VT-200)


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.

Standard Configuration

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.

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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