Abstract: An apparatus for separating oil and water from an emulsion including a horizontal vessel having an emulsion inlet at the inlet end and an upper oil outlet and a lower water at the discharge end. Baffles within the vessel cause the emulsion to flow vertically through an electric grid system, subjecting the emulsion to an electric field, and a plurality of spaced apart paralleled separator screens between the baffles and the discharge end of the vessels, each separator screen being a planar foraminous reticulum of integrally formed small width and small thickness strands of which are longitudinally downwardly inclined which carry separated water to the bottom of the vessel.