page_title: Tensiometer (surface tension)
section_title: Du Noüy ring tensiometer
hierarchical_section_title: Tensiometer (surface tension) / Types / Du Noüy ring tensiometer
caption_attribution_description: Deutsch: Platin-Iridium-Ring eines Du Nouy Tensiometers. English: Pt-Ir ring of a Du Nouy tensiometer. Français&#160;: Tensiomètre à anneau de Du Nouy en Pt-Ir. Magyar: Du Nouy rendszerű tenziométer Pt-Ir-gyűrűje mérés közben.
context_page_description: A tensiometer as it applies to physics is a measuring instrument used to measure the surface tension of liquids or surfaces. Tensiometers are used in research and development laboratories to determine the surface tension of liquids like coatings, lacquers or adhesives. A further application field of tensiometers is the monitoring of industrial production processes like parts cleaning or electroplating.
context_section_description: This type of tensiometer uses a platinum ring which is submersed in a liquid. As the ring is pulled out of the liquid, the force required is precisely measured in order to determine the surface tension of the liquid.
  The method is well-established as shown by a number of international standards on it such as ASTM D971. This method is widely used for interfacial tension measurement between two liquids but care should be taken to make sure to keep the platinum ring undeformed.
caption: Du Noüy tensiometer in liquid.
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