Products

Liquid Helium

Storage Dewar Insert

Janis Research offers a variable temperature exchange-gas storage dewar insert (VTI) designed for use in 60 liter or 100 liter LHe storage dewars. It can operate from <5K - 500K. 

Click image to enlarge view of variable temperature exchange-gas storage dewar insert designed for use in 60 liter or 100 liter liquid helium storage dewar. Click image to enlarge view of variable temperature exchange-gas storage dewar insert designed for use in 60 liter or 100 liter liquid helium storage dewar. Click image to enlarge view of variable temperature exchange-gas storage dewar insert designed for use in 60 liter or 100 liter liquid helium storage dewar. Click image to enlarge view of variable temperature exchange-gas storage dewar insert designed for use in 60 liter or 100 liter liquid helium storage dewar.

Design features include:

  • Exchange gas manifolds include separate valves for gas inlet and outlet, so it is simple to tell which position is open and closed.
  • Safety pressure relief on central rod of sample positioner prevents the sample positioner from being launched upward if an ice blockage forms. 
  • Capacitance vacuum/pressure gauge for monitoring the pressure in the sample tube. This is a digital gauge that can display the pressure in a variety of units and also has an analog bar to show dynamic changes in the pressure. Capacitance gauges work in any environment, including Helium, so the pressure measurement is accurate.
  • Sliding seal on the outer vacuum shroud allows the VTI to be slowly inserted into the LHe dewar without having cold Helium gas rapidly escape.

Click here to visit our Liquid Helium storage dewars web page.

Contact Janis today for further details.

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