In the case of measurements in aqueous solutions, the value of the conductivity is directly proportional to the concentration of dissolved solids, therefore, the higher said concentration, the greater the conductivity.
In addition to normal conductivimeters, there are instruments that automatically convert the conductivity value into ppm, directly offering the measurements of dissolved solids concentration.
The conductivity of a solution is determined by a molecular movement. The temperature influences this movement, so it is necessary to take it into account when making precision measurements. Generally, for comparative measurements, the reference temperature is 20 °C or 25 °C. To correct the effects of temperature, a compensation factor β is used. It is expressed in% / °C which varies according to the composition of the solution being measured. In most applications, the β coefficient is set at 2% / ºC.