Interface detection device and system for dispersed multi-phase fluids

A method of monitoring a process using a froth measurement apparatus, the froth measurement apparatus, comprising:

• an elongate first housing portion;
• a series of sensor probes positioned along the first housing portion, each of the sensor probes having a probe body extending away from the first housing portion by a distance and comprising first and second electrodes for measuring changes in electrical potential associated with froth and/or bubbles, the first and second electrodes being electrically insulated from each other, wherein a first sensing surface at a distal end of the first electrode is spaced from a second sensing surface at a distal end of the second electrode, wherein each sensor probe comprises respective signal processing circuitry coupled to each probe body to receive an analog output signal from each respective probe body and to generate a digital output signal based on the respective analog output signal;
• and
• at least one processor configured to receive the digital output signals or sensor information of the series of sensor probes based on the digital output signals and configured to determine at least one froth parameter over a sampling period based on the digital output signals or the sensor information, the method comprising:
• determining the at least one froth parameter;
• determining a modified process parameter based on the at least one froth parameter;
• and
• applying the modified process parameter to the process;
• wherein the at least one froth parameter comprises a measured bubble size and/or a measured bubble quantity.