Accessories and Ancillary Equipment

Liquid Helium Transport/Laboratory Storage Dewars

Cryofab, Inc.

Cryofab model CF-100 helium dewar

The Cryofab CMSH helium dewar is designed for minimum loss storage, transportation and dispensing of liquid helium. The CMSH container employs state of the art vapor cooled multishield technology in conjunction with superinsulation to effect the lowest guaranteed loss rates in the industry on comparable units. The advanced insulation system results in quicker, more efficient cool down without the need for nitrogen pre-cooling. In addition, the elimination of LN2 or helium gas circulation shielding means that the CMSH is virtually maintenance free.

These units have the same general areas of use as old-style, 4-wall helium containers but permit large storage capacities in small packages with lighter weight.

 

 

Model Gross Capacity Daily Boil Off Rates Overall Height* Body Diameter Empty Weight Transfer Line Fittings
CF-30 34 Liters 2.75% 48" 20" 131 lbs. 3/8" or 1/2"
CF-60 65 Liters 1.5% 51" 24" 192 lbs.
CF-100 110 Liters 1% 59" 24" 210 lbs.
* NOTE: Overall height includes 4" casters.

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Messer

Click image to enlarge view of Messer's Stratos 100 SL liquid helium dewar available from Janis Research

The Stratos® 100 SL liquid helium dewar is a type-approved transport vessel (according to ADR/RID) for transport in closed condition under pressure with: 

  • approval by the German TÜV with necessary factory tests
  • high qualified and certified material
  • rugged head protection ring included
  • safety head with safety neck tube included
  • central DN50 ball valve
  • better insulation with lower evaporation rate
  • long life vacuum protection system with multiple He-leak tests, special treated adsorbent and getter materials
  • type plate and transport labeling

These dewars include roller base and adapter. Options include level probe and display.


Model Capacity Daily Loss with BHK Head Neck Diameter Filled Weight Empty Weight
Stratos® 100 SL 103 Liters 0.7 Liters 1.88" I.D. 112 lbs. 80 lbs.

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Storage Dewar Insert

Click here to visit our web page for 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.

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Pulsation Dipstick

Click image to enlarge view of Pulsation Dipstick from Janis Research

This simple liquid helium probe provides an accurate indication of the liquid level in a storage dewar or research cryostat. The configuration on the right has a thin rubber diaphragm o-ring sealed over the upper portion of the dipstick. The assembly is connected to a small diameter stainless steel tube that is inserted into the liquid helium. The overall length of the stainless steel tube is designed to the customer's specification. The dipstick produces a steady low frequency pulsation when immersed in liquid helium which can easily be felt at the diaphragm with a finger tip. When the dipstick is raised just above the liquid level, a high frequency pulsation occurs. The stainless steel tubing is attached to the diaphragm assembly by a threaded fitting and is easily replaceable.

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Janis

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