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LN2 Dewar

post #1 of 8
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Does anyone know the best design for one of these? Will only be used for LN2.
post #2 of 8
For transporting small amounts of Liquid Nitrogen ?



As long as the interior is stainless steel; glass will probably crack. Don't tighten the cap all the way or it will become a "dry ice bomb"; some of the pressure must be allowed to escape as the Liquid Nitrogen boils off.

(Sir James Dewar is the name of the person who invented the vacuum flask/Thermos bottle)
    
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post #3 of 8
Quote:
Originally Posted by yuandrew View Post
For transporting small amounts of Liquid Nitrogen ?



As long as the interior is stainless steel; glass will probably crack. Don't tighten the cap all the way or it will become a "dry ice bomb"; some of the pressure must be allowed to escape as the Liquid Nitrogen boils off.

(Sir James Dewar is the name of the person who invented the vacuum flask/Thermos bottle)
also make sure that you wear thick gloves (fire proof)
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post #4 of 8
where are you getting said nitrogen?
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post #5 of 8
if you close that bottle with LN2 in it you will get very cold because it will explode and spray LN2 all over your face
    
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post #6 of 8
Quote:
Originally Posted by dualhYbrid View Post
where are you getting said nitrogen?
I've read Cryogenics labs and the like will actually give you some for free, if you approach them in the correct manner, and explain what you're doing.

Then again, who has Cryogenic facilities near them?
    
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post #7 of 8
lol if i was doing this id just get my dad to bring some from the university he works at

seing the ln2 bomb would be great entertainment
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post #8 of 8
meh. even if it sprays over your face nothing really happens. friend of mine went to a physics-project over at some university, where they were showing stuff involving LN2. he told about having the stuff poured over his hand and that it felt "a little cold". it pretty much evaporated before it hit him.

the guide there supposedly even stuck his hand inside an LN2 tank. the LN2 evaps around the hand, providing a thin protective layer of gas. though its not recommended to keep your hand in too long, obviously.
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