Granny's gone and done it again

I have a question.... May be I'm overthinking this entirely and I should just get some sleep and stop thinking, but hey...

So water with any impurities freezes at lower than 0/32 degrees, right? Well, I'm calibrating my thermometers in a mostly-ice solution and all five thermometers are reading -1.1/30 after 5 min. May this test be slighty inaccurate that way? I'm using well water, so it's far from pure....

Should I keep trying to get a reading of 0/32, or say they all agree and that's good 'nuff?
 
I have a question.... May be I'm overthinking this entirely and I should just get some sleep and stop thinking, but hey...

So water with any impurities freezes at lower than 0/32 degrees, right? Well, I'm calibrating my thermometers in a mostly-ice solution and all five thermometers are reading -1.1/30 after 5 min. May this test be slighty inaccurate that way? I'm using well water, so it's far from pure....

Should I keep trying to get a reading of 0/32, or say they all agree and that's good 'nuff?


Boil some and try again?
 
Ah! Yes, I should try that.
highfive.gif

x2 good idea camping
 
Quote: I mean boil it for the impurities. Or pick up a jug of distilled? Then do the slurry. Be interesting to see a difference.

It would be interesting to see if the thermometer is sensitive enough to pick up the difference in the temps. Will the thermometer read in tenths? I think it would not register otherwise.
 

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