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ForSp. Gr. 0.700 to 2.000, all glass, with parallel graduated stem.
To measure the charge of lead-acid storage batteries by measuring specific gravity of the electrolyte. Hydrometer float calibrated for specific gravity. 1.100-1.350 range with coloured zones. The float is contained in a glass tube fitted with a rubber nozzle and a flexible rubber bulb.
For liquid and solid density experiments, comprises hollow metal floatation body, upper loading pan, and weighted lower cone, all black painted. Approx length 25cm