NEW CONTACTLESS INDUCTIVE SENSOR FOR THE MEASUREMENT OF CONCENTRATIONOF AN ELECTROLYTIC SOLUTION

In this paper an inductive sensor with a new and simple contactless st ructure to determine the concentration of an electrolytic solution is presented. The authors propose a novel idea ol designing the sensing c oil of the sensor so that the magnetic field is focused inside the con ducting liquid, thereby increasing the sensitivity of the sensing coil . By detecting the change in inductance of the sensing coil due to a s olution of known concentrations of a particular electrolyte, a databas e is created, With the help of this database it is possible to estimat e the unknown concentration of an electrolytic solution, It was tested for various concentrations of NaCl and it shows a distinct response f or each concentration.