Ans. This meter is used to test the specific gravity of the liquid. It consists of a glass made tube with bulb. The glass tube is filled eith smsll lead pieces and is fitted with scale on which specific is written as well as the indication of change to discharge condition of a cell is also written This Hydrometer is kept in another glass made tube. On one side of this tube a rubber ball is fitted and on the other side, nozel is fitted.
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