Alcohol Hydrometer: Tools for Making Alcohol Fuel Are Available

If you're distilling your own alcohol fuel, an alcohol hydrometer will tell you whether the product is pure enough.
By the MOTHER EARTH NEWS editors
May/June 1979
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An alcohol hydrometer resembles a thermometer.
PHOTO: MOTHER EARTH NEWS STAFF


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In order to properly determine the strength of your distilled alcohol, you'll need a quality alcohol hydrometer. Although a simple "burn" test does indicate that your mixture is over 100 proof, it's necessary to know precisely what percentage of alcohol, by volume, is contained in the final product. Especially when you plan to use alcohol fuel to run an engine or fuel a pump-fed furnace.

A hydrometer is simply a device that measures the specific gravity of a liquid, in this case, ethanol. (Automotive-type hydrometers—used to test wet-cell batteries—are not suitable for determining alcohol percentages.) The instrument we relied on during our tests proved to be accurate and simple to use, and we made arrangements with the manufacturer to supply us with a large quantity since we figured other experimenters would want to have this necessary "tool." (High-proof alcohol hydrometers are difficult to obtain singly, and the type used by winemakers doesn't have the range necessary to test a nearly pure distillate.)

If you have a problem finding the right kind of hydrometer (or if you don't even want to try to locate one), we now have our six-inch, 0-200 proof instruments available. We have also obtained fermentation locks if you want one of those.








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