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Dewar flask query

  1. Apr 15, 2013 #1
    I have an old dewar flask i found on clean up day, i was wondering, when i shake it, i hear a strange clinging noise inside, what could it be? (its the type used for bio samples)
     
  2. jcsd
  3. Apr 16, 2013 #2

    Danger

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    Have you tried looking inside? My first thought is that it's broken, and a piece of glass is rattling around between the walls.
    Also, I assume that you mean a clanging noise. Clinging is usually silent, with perhaps a moan or two. :tongue:
     
  4. Apr 18, 2013 #3
    I can just see the bottom, where the sample holders go, there are no signs of break, but there could be a crack at the top somewhere. only way i can check it still has vacuum, is to fill it with n2 or ice and see how long it lasts?

    Sorry about my onomatopoeia
     
  5. Apr 18, 2013 #4

    Danger

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    Don't be; I can't make jokes without ammunition. :biggrin:

    edit: Come to think of it, can you use an inspection mirror? That's a small mirror on the end of a telescoping handle similar to a an old portable radio antenna. You can get one for a couple of bucks at any auto parts supplier and most hardware stores. (They're used by mechanics to check in tight spaces and under things.)
     
    Last edited: Apr 18, 2013
  6. Apr 24, 2013 #5

    FlexGunship

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    dewar-flask.jpg

    I believe this happens when the scotch hardens into candy.
     
  7. Apr 24, 2013 #6

    Danger

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    :rofl:

    Jeez, Flex! Long time, no giggles. From wherever you've been hiding, welcome back.
     
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