A Conductivity Measurement System Based on High-speed A/D Peak Sampling

A conductivity measurement system driven by sinusoidal current is designed here, which adopts parallel sampling and holding plus a unaware high-speed A/D converter. Driven by high frequency sinusoidal currents and armed with six pairs of conductive poles of stainless steel array, the system only samples and converts the differences of the voltage´s peak and trough, weakens the pole´s polarization efficiently. Meanwhile, the filtration latency caused by the traditional analog demodulation is avoided. Such a system can be widely applied in detecting the parameters of the electro-conductivity multiphase because of its rapid signal gathering speed, stability and less complexity.