An industrial process control transmitter , comprising: a first terminal configured to apply an electric field to a fluid process solution; a second terminal configured to sense an inductive response to the applied electric field in the fluid process solution ; a concentration processor coupled to the first terminal and the second terminal via signal transducers; and a computer-readable memory device coupled to the concentration processor and storing one or more processor-executable instructions thereon, said processor-executable instructions, when executed by the concentration processor , cause the concentration processor to: generate a drive signal in the first terminal to generate the electric field, receive a response signal from the second terminal , said response signal generated from an inductive response in the fluid process solution , measure conductivity of the fluid process solution from the drive signal and the response signal, determine two or more concentration values corresponding to the measured conductivity, measure capacitance of the fluid process solution by monitoring time dependence of the inductive response to the applied electric field, determine a dielectric constant of the fluid process solution based on the measured capacitance, and output one concentration value of the two or more concentration values that most closely matches a concentration of the fluid process solution that causes the determined dielectric constant. a first terminal configured to apply an electric field to a fluid process solution; a second terminal configured to sense an inductive response to the applied electric field in the fluid process solution ; a concentration processor coupled to the first terminal and the second terminal via signal transducers; and a computer-readable memory device coupled to the concentration processor and storing one or more processor-executable instructions thereon, said processor-executable instructions, when executed by the concentration processor , cause the concentration processor to: generate a drive signal in the first terminal to generate the electric field, receive a response signal from the second terminal , said response signal generated from an inductive response in the fluid process solution , measure conductivity of the fluid process solution from the drive signal and the response signal, determine two or more concentration values corresponding to the measured conductivity, measure capacitance of the fluid process solution by monitoring time dependence of the inductive response to the applied electric field, determine a dielectric constant of the fluid process solution based on the measured capacitance, and output one concentration value of the two or more concentration values that most closely matches a concentration of the fluid process solution that causes the determined dielectric constant. generate a drive signal in the first terminal to generate the electric field, receive a response signal from the second terminal , said response signal generated from an inductive response in the fluid process solution , measure conductivity of the fluid process solution from the drive signal and the response signal, determine two or more concentration values corresponding to the measured conductivity, measure capacitance of the fluid process solution by monitoring time dependence of the inductive response to the applied electric field, determine a dielectric constant of the fluid process solution based on the measured capacitance, and output one concentration value of the two or more concentration values that most closely matches a concentration of the fluid process solution that causes the determined dielectric constant. <EOS>