of the second pipe 41 and the heavier water tends to be held in the lower section part of the flow liquid liquid cyclonic separator 26 divides liquid flow into two portions one that proceeds along oil dominated flowline 28 and another that proceeds along water dominated flowline 30 flowline 30 also comprises differential dielectric sensor 43 which functions to provide underflow watercut measurement and additional information other meters may not be able to provide other sensors or combinations of multiple sensors in other applications of the invention could be used instead of a differential dielectric sensor to determine the oil concentration in the water electronic signals are sent from differential dielectric sensor 43 to the control system 52 and when necessary signals are sent to second control valve 50 to adjust flow differential dielectric sensor 43 provides an early oil detection system liquid liquid cyclonic separators operate using centrifugal forces caused by the swirling motion of the fluid entering fluid and by operation of gravity heavier water is forced radially outward toward the cyclone wall and is collected from below while the lighter oil moves towards the center of the cyclone and is taken out from the top this type of device provides an efficient and compact mechanism for oil water separation a coriolis flow meter 46 or similar device measures oil concentrated flow to first control valve 49 a computer display 35 reveals the data collected and when necessary signals are sent along pressure control line 58 to.