Individual: F6Science:FTU

http://archive.astro.umd.edu/Ontology/F6/OWL/F6Science.owl#FTU

rdfs:comment "The most widely used measurement unit for turbidity is the FTU (Formazin Turbidity Unit). ISO refers to its units as FNU (Formazin Nephelometric Units). - Wikipedia.com" (en)