A light-oil separator device includes a collector funnel having a downwardly directed stem portion having an outside diameter. The stem portion adapts to insert in an upward extending neck portion of a collection vessel. The neck portion includes an inner diameter that is greater than the outer diameter of the funnel stem. The neck also includes an oil port at a first height. The vessel includes a body having a hydrosol port at a lower portion of a body sidewall. This port connects to an evacuation tube having a proximal end and an S-shape. This conduit includes an air vent at a top portion at a second height lower than the first height, the air vent extends upward to a height higher than the first height. The S-shape conduit terminates with a downward facing end portion at its distal end.