| 摘要 |
A specific gravity control apparatus 200 is disclosed which uses a plurality of electrodes 202, 204 and 206 to measure the height of a control liquid within a leg 8 to provide enhanced control of the specific gravity of the solution S. In a specific gravity control apparatus 250, a flexible diaphragm 254 isolates the solution from a control fluid. This permits a nonconductive solution to be maintained at a specific gravity by the apparatus using at least one electrode to measure the level of the control liquid which can be conductive.
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