• June 20, 2019

CSC Scientific DuNouy Precision and Interfacial Tensiometers. Provides rapid surface tension measurements—15 to 30 secinds. $7, – $8, The force maximum is determined with a modern tensiometer (K, K20) with the help of an With the Du Noüy ring method, a correction must be made to the . The CSC-Dunouy Tensiometer is a precision instrument used for measuring both The CSC-Dunouy Tensiometers (Fig.1 and 2) use a fine torsion wire for.

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Views Read Edit View history. The method involves slowly lifting a ring, often made of platinum, from the surface of a liquid. Commons category link is on Wikidata.

The maximum force is used for the calculations, and empirically determined correction factors are required to remove the effect caused by the finite diameter of the ring:. Earlier, torsion wire balances were commonly used.

Du Noüy ring method

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There are applications where the surface tension at the boundary of two liquids needs to be measured.


TEN Du Nouy Tensiometer, Ring method – Tensiometer / Goniometer – United Test

The measurement is performed with a force tensiometerwhich typically uses an electrobalance to measure the excess force caused by the liquid being pulled up and automatically calculates and displays the surface tension corresponding to the force.

Item Quantity Frame 1 set Platinum ring R9. The method involves slowly lifting a ring, often made of platinum, from the surface of a liquid. Fundamentals of Interface and Colloid Science: The most common correction factors include those by Zuidema and Waters for liquids with low interfacial tensionHuh and Mason which covers a wider range than Zuidema-Watersand Harkins and Jordan more precise than Huh-Mason while still covering the most widely used liquids.

Retrieved from ” https: The Journal of General Physiology.

In other projects Wikimedia Commons. Surface Tensiometer Du dk ring tensiometer. Platinum ring perimeter length. Du Nouy ring method: From Wikipedia, the free encyclopedia.

This is called interfacial surface tension. Rockwell hardness tester Brinell hardness tester Vickers hardness tester Universal hardness tester Micro vickers hardness tester Hardness block.

The du Nouy ring method is one tensiometee by which the surface tension of a liquid can be measured.

Measuring instruments Laboratory equipment. The force required to raise the ring from the liquid’s surface is measured and related nouu the liquid’s surface tension. The force needed to break the boundary going from the tesiometer liquid to the greater density liquid tensiometdr measured by pushing the ring down through the boundary. This test is performed by pulling the ring upward through the surface of the liquid. The Tensiometer for this test needs to pull the ring up through the boundary between the lower, higher density liquid, and the liquid that is floating above.


The force needed to break through the surface of the higher density liquid is recorded as interfacial surface tension. To measure the surface tension between a liquid and the air, the Tensiometer duNouy ring is placed below the surface of the liquid.

Copyright Beijing United Test Co. The force needed for tenaiometer ring to break the surface overcome the surface tension is determined. Documents Manual, packing list, certificate.