A hydrometer is an instrument used to measure the specific gravity or relative density of liquids, i.e. the ratio of the density of the liquid to the density of water.
- Made of glass
- Consists of a cylindrical stem and a bulb
- Bulb weighted with a heavy material to make it float upright
- 0.650-0.700 g/ml.
- 0.700-0.750 g/ml.
- 0.750-0.800 g/ml.
- 0.800-0.850 g/ml.
- 0.850-0.900 g/ml.
- 0.900-0.950 g/ml.
- 0.950-1.000 g/ml
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