SGI:03 – Basics
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HYDROMETER
Basics |
| The following illustrates the versatility of the hydrometer (with specific gravity scale). |
 A hydrometer usually looks like this |
 But one could alsolook like this |
1 kg dissolved sugar has a volume of 0,63 litres1 litre of alcohol weighs 0,8 kg2,7 grammes gives 1 hydrometer degrees in 1 litre of waterFermented hydrometer degrees divided by 8 = % volume of alcohol.A finished wine must have a certain hydrometer reading to be balanced (refer to table)
17 grammes of sugar ferments to 1% alcohol in 1 litre of wine The hydrometer reading -1000 x 2 = grammes of sugar in fruit juice Strong wine yeast only tolerates 16-18% alcohol (table wine 13%), after which fermentation ceases |