Hydrometer with at least 0.990 to 1.120 range
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A hydrometer (shown in picture) is used to measure the density of liquids. The denser the liquid, the higher it floats. When taking a gravity reading give the hydrometer a spin first to dislodge any air bubbles and always read the lowest part of the water line (the bottom of the meniscus).
We use a hydrometer that reads from 0.990 to 1.120. The range is large enough to cover any beer that we'd ever think of making. A hydrometer test jar is also needed in order to float the hydrometer in the liquid sample.
For greater accuracy, narrow range hydrometers are also available such as a final gravity hydrometer, meant for taking readings in only the 0.980 to 1.020 range.
For complete details see our Measuring Gravity guide.
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