Acid, Alkali And Salt Concentration Sensors

Acid, alkali, and salt concentration sensors determine the concentration by measuring the conductivity of the solution. It can continuously detect the concentration of acid, alkali, and salt in aqueous solution in industrial processes online. This sensor is mainly used in industrial production processes such as boiler feed water treatment, preparation of chemical solutions, and environmental protection.
The working principle of acid, alkali, and salt concentration sensors is: within a certain range, the concentration of acid and alkali solutions is proportional to the size of their conductivity. Therefore, as long as the size of the solution conductivity is measured, the acid and alkali concentration can be known. When the measured solution flows into a special conductivity cell, if the electrode polarization and distributed capacitance are ignored, it can be equivalent to a pure resistor. When a constant voltage alternating current flows through, its output current is linearly related to the conductivity, and the conductivity is proportional to the acid and alkali concentration in the solution. Therefore, as long as the solution current is measured, the concentration of acid, alkali, and salt can be calculated.
The acid, alkali, and salt concentration sensor is mainly composed of a conductivity cell, an electronic module, a display head, and a shell. The electronic module circuit is composed of an excitation power supply, a conductivity cell, a conductivity amplifier, a phase-sensitive rectifier, a demodulator, temperature compensation, overload protection, and current conversion units.