Antique Old Vintage German Alcohol Meter Hydrometer Oechsle scale Wine-making

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Antique Old Vintage German Alcohol Meter Hydrometer Oechsle scale Wine-making:
$29.99

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Antique Old Vintage

German

Alcohol Meter / Hydrometer

Oechsle scale

for Wine-making

Measures: 6 1/2\" length

TheOechsle Scaleis ahydrometerscale measuring thedensityofgrapemust,[1]which is an indication of grape ripeness and sugar content used inwine-making. It is named forFerdinand Oechsle(1774-1852) and it is widely used in On the Oechsle scale, onedegree Oechsle(° Oe) corresponds to onegramof the difference between themassof one litre of must at 20°Cand 1kg (the mass of 1litreofwater). For example, must with aspecific massof 1084 grams per litre has 84° Oe.

The mass difference between equivalent volumes of must and water is almost entirely due to the dissolvedsugarin the must. Since thealcoholinwineis produced byfermentationof the sugar, the Oechsle scale is used to predict the maximal possible alcohol content of the finished wine. This measure is commonly used to select when to harvest grapes. In the vineyard, the must density is usually measured by using arefractometerby crushing a few grapes between the fingers and letting the must drip onto the glass prism of the refractometer. In countries using the Oechsle scale, the refractometer will be calibrated in Oechsle degrees, but this is an indirect reading, as the refractometer actually measures therefractive indexof the grape must, and translates it into Oechsle or different wine must scales, based on their correlation to refractive index.

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