Fluidic density control for chlor alkali cells

An apparatus for diluting a caustic liquid , comprising:

• a reservior means for containing a caustic liquid;
• a hydrometer having a body that is immersed within the caustic liquid;
• said hydrometer having an elongate, upwardly extending neck means;
• a head member that surmounts said neck means;
• supporting means for supporting said head member at a predetermined height so that said head member cannot fall below said predetermined height;
• nozzle means for directing a stream of water in a horizontal direction;
• and said nozzle means being positioned a predetermined distance above said head member when said head member is supported by said supporting means;
• whereby said head member rises into the path of said stream of water when said hydrometer rises due to an increase in the density of said caustic liquid;
• whereby said head member, when in its elevated position, deflects said stream of water downwardly into the caustic liquid, thereby diluting it;
• and
• whereby said hydrometer sinks when the density of said caustic liquid has decreased due to said dilution and said head member exits the stream of water so that said dilution of the caustic liquid ends.