--- Harry <gnikomson2000@...
> --- In Distillers@yahoogroups.com, Trid <triddlywinks@...> wrote:
> > Bwuh? We *are* comparing the density to water.
> >>>>>>>No we're not. In a finished product, we're measuring the
> ratio of the ethanol in a liquid that contains some ethanol (amount
> as yet unknown) to the known SG or density of PURE ETHANOL, not
> water. This resulting figure is the Alcohol By Volume not the water
> by volume. The other liquids/substances in the sample could be many
> things besides water.
> Alcoholmeters are calibrated to pure ethanol at 20°C. Hydrometers
> are calibrated to pure water at 4°C. See the difference? Even
> though technically they are both hydrometers. All that name means
> is a closed tube that floats.
The basis for my angle was that (at least as far as I understand) our resultant
distillate is by a vast majority a mixture of ethanol and water.
> >>>>>>>>>>>You won't get meaningful measurements, because the two
> instruments are calibrated to different pure substances at different
> base temperatures.
...and this I understand...now :) I'm gonna blame thissun on lack of sleep.
> >>>>>>>>>>>>>I know what you mean, and what you're trying to
> achieve. But it can only be at best a broad approximation, not an
> accurate measurement, for the reasons stated above.
> Buy an
> alcoholmeter. They're not much more expensive than a fermentation
...as Mr. Google also revealed :)
> Then check your measurements using both. You'll see
> big differences as the percentage of ethanol reduces.
Very good point...I'm actually quite interested in checking that out. I'd like
to see how far off I am and where my assumptions fall off.
> And the
> comparison scale isn't linear, either. That's why it's impossible
> to produce a chart to swap between one and the other.
Thanks again for the perspective.
-back to slee...ZZzzZzZZzzzzzz...