Characterization of fluid inside pipe using multi frequency electrical signal

A system for determining fluid characteristics, the system comprising:

• a set of electrodes configured to measure an impedance characteristic of fluid inside a pipe, the set of electrodes including a first electrode positioned at a first location along the pipe and a second electrode positioned at a second location along the pipe;
• a signal generator configured to generate a multi-frequency signal, the multi-frequency signal inducing voltage difference between the first location along the pipe and the second location along the pipe, the voltage difference induced for multi-frequency measurement of the impedance characteristic of the fluid inside the pipe;
• and
• one or more physical processors configured by machine-readable instructions to:
• obtain the multi-frequency measurement of the impedance characteristic of the fluid inside the pipe from the set of electrodes;
• and
• determine fluid composition of the fluid inside the pipe based on the multi-frequency measurement of the impedance characteristic of the fluid inside the pipe, the fluid composition of the fluid including hydrocarbon concentration in the fluid;
• wherein:
• responsive to the voltage difference being initially induced for the multi-frequency measurement of the impedance characteristics of the fluid using voltage input and the hydrocarbon concentration in the fluid being lower than a first threshold value, the inducement of the voltage difference is switched from using the voltage input to using current input;
• and
• responsive to the voltage difference being initially induced for the multi-frequency measurement of the impedance characteristics of the fluid using the current input and the hydrocarbon concentration in the fluid being higher than a second threshold value, the inducement of the voltage difference is switched from using the current input to using the voltage input.