OPERATING PRINCIPLES
The salinometer detects the current between two metallic electrodes, inserted in the electrode cell immersed in the solution to be measured.
Apart from the salt concentration, the resistance is also a function of the geometric characteristics of the electrode cell. The parameter defining any cell is a constant value expressed in cm. and, thus, states the cell gauging, expressed in fls/cm. For usefulness and usual practice, the salinity indicating device is set keeping into account the concentration of sodium chloride in the fluid.
If the rate between conductivity and concentration is given, at a stated temperature, it is possible to obtain the concentration value, within the usual range from 0 to 100 mg/lt. or p.p.m. of sodium chloride. At 20 ac, the concentration of sodium chloride, in mg/lt, is equal to 0.5 times abt. the conductivity expressed in fls/cm.

CONTROLS
The salinometer is fitted with a main n switch that, when in the "ON" position, lights withe lamp. When a salinity exceeding the max. value is detected, in a test point previously set, an alarm red lamp is lit. The gauging of the set point is possible by regulating, inside the instrument case, on a dial with ranges of 3.5 mg/lt., up to the max. value of full scale of the meter in p.p.m.

INSTALLATION
The salinometer is designed for wall-mounting. The instrument case is water-proof with an IP 54 protection degree and can operate, without particular problems, in any environment, both temperate or tropical. Thanks to the particular construction of the cell holder directly placed on the pipeline where the fluid on which measurement can be carried out flows, it is possible to extract the test cell without interrupting the fluid flow.