  Determining of the solute mass amount in seawater using in situ measurements
in seas and oceans remains now an unresolved problem. To solve it, it is
necessary to develop both new methods and instruments for measurements. This
article analyzes methods for the indirect measuring of salinity and density
using parameters that can be measured in situ, including relative electrical
conductivity, speed of sound, temperature and hydrostatic pressure. The authors
propose an electric conductivity sensor design that allows for obtaining data
on solid suspensions along with measuring the impedance of electrodes under
various the alternating current frequencies. The authors analyze the joint
measurement technique using the CTD and SVP devices in a marine testing area.
Based on the results of joint measurements, the authors present tests of water
samples of various salt composition for the presence of solid suspensions.
