Put the sample which distilled into a round bottom flask
Add water and connect the device.
Heat the bottle until the water in the bottle boiled into steam. The steam will carry the condensed essential oil vapor back.
Continue to boil the sample in a round bottom flask until the desired amount of oil is obtained
The oil can be extracted from the end of the tube of the essential oil receptacle.

Note: The distilled essential oils both have heavier or lighter than water properties. Must use the correct labware which suitable to the user's purpose.