System for the perception of oil pollution in the ground water

摘要

System for detecting oil pollution in ground-water, especially in the immediate vicinity of underground tank installations, having an oil film detector and a display device, in which a vertical drain pipe is arranged which is provided with a multiplicity of openings in the pipe wall and which reaches into the earth from the surface of the earth as far as beyond the lowest possible ground-water level, an oil film detector being mounted on a float floating in the drain pipe and being connected to the display device. IMAGE