The accuracy in determination of coefficient of linear expansion of the material of a rod depends on the precision level of measurement of the expansion produced as a result of rise in its temperature, which is provided by a dial gauge indicator, graduated 0.01 mm per division. Ideal for higher grade students. The apparatus is similar to LINEAR EXPANSION APPRATUS in construction but has a dial gauge indicator instead of micrometer, which can be easily assembled into the apparatus or removed for convenient storage. It requires no electrical terminals or accessories for measurement. The apparatus comes completely assembled and includes four expansion rods, one each of steel, brass, aluminum, and copper.
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