Figure 10-41.--Salinity indicator panel.

packing nut to form a watertight seal. The packing

operates on the principle that an increase in

nut has a set screw that screws into a groove in the

electrolytic impurities (salt) will increase the

cell tube to prevent axial displacement of the tube by

conductivity of the water. Therefore, the higher the

the hydrostatic pressure. A steel ring stop on the cell

impurities, the higher the current.

tube, between the packing nut and the nipple, locates

The salinity cell is a self-contained unit consisting

the cell properly in the piping.

of a nipple, packing nut, cell tube, and electrode

assembly. The cell tube provides a means of

A 6-foot, three-conductor cable connects the cell to

extending the electrode assembly through the valve

the salinity indicating panel and the ship's 115-volt,

and is connected to the tee through the nipple and

140.201

Figure 10-41.--Salinity indicator panel.

10-26