Oil-pollution detector - for use on marine petroleum operating/storage platforms, using U-tube appts

摘要

Detection of a liquid contaminant in a stream of liquid of different density comprises introducing the stream into a U-tube having an outlet limb at a predetermined height, detecting the level of the liquid in the inlet limb of the U-tube and determining the variations in level in this limb showing the presence of liquid contaminant in the stream of liquid. The liquid contaminant is pref. petroleum and the uncontaminated stream of liquid is water.