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Idea Broken Thermometer columns

1 year 5 months ago #40907 by SteveKeys
Not sure how many of you already do this, but having just been telling someone about this little gem of an idea, I thought I would share it here too.

Got some thermometers with air bubbles in the column? Want a super fast and super easy way to fix them and get them back in action?

Simple! Sit them in a centrifuge for a couple of minutes and the air bubbles will be banished back from whence they came!!!

Use the time you save by doing this, to put the kettle on and grab a Jammie Dodger.
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1 year 5 months ago #40908 by AndyG
Good idea!

Unfortunately in our big tilting bucket unit a thermometer will crash the rotor.

Have to haul the old Denley out of the shed and see if it's got a fixed angle rotor ...

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1 year 5 months ago #40910 by bsimmo
How big is your centrifuge.

Just stick end in a bunsen, gently heat till it collects in the end and the bubble has gone and enjoy a warm prep-room during the winter.
Leave upright to cool gently.

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1 year 5 months ago #40912 by SteveKeys
Standard size centrifuge and 15cm thermometers - longer ones only used in upper school and tend to be fine. Our method works really well and saves the small - but potential all the same - risk of over heating the thermometer with a Bunsen.

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1 year 5 months ago #40913 by AndyG
If you're heating them it's more controllable in an oil bath on a hot plate and you can do them in bulk.
They can explode if directly heated even with a tea-light flame and a distraction ...

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1 year 3 months ago #41118 by DavidS
I used to put them in the freezer so that bubbles are removed either that or ice with CaCl2 in as that drops temperature to -23oC

It is best to remember that when you are up to your waist in Alligators that your original intention was to drain the swamp!

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