Manual Tensiometer K6: A Tensiometer for rapid determination of interfacial tension and the surface tension of liquids and a very successfully instrument wherever it is necessary to test the effectiveness of emulsifying agents, soaps and wetting agents.As well as It is used to indicate the presence of oxidation and polymerization in fats, organic and inorganic oils and fuels, etc K6 is also suitable for training purposes in schools and universities for demonstrating the action of the surface tension force in a comprehensible manner.