CSC Manufacturers Tensiometers In the United States.

Surface Tension

Precision and Interfacial DuNouy Tensiometer

Now You Can Replace Your Tensiomat

Have you seen the news that CSC has a replacement for the discontinued Fisher Tensiomat. Send it to us and get a new CSC Precision or CSC interfacial Tensiometer for incredible savings.

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Applicable ASTM Methods

ASTM Methods that call for DuNouy Ring Tensiometers are:

  • D971 - Interfacial Tension of Oil Against Water 
  • D1331 - Solutions of Surface Acting Agents
  • D1417 - Synthetic Rubber Lattices
  • D1590 - Surface Tension Industrial Water and Industrial Wastewater

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CSC Precision and Interfacial
DuNouy Tensiometers

CSC Offers two duNouy Tensiometers.

To measure the surface tension between a liquid and the air, theCSC Precision Tensiometer duNouy ring is placed below the surface of the liquid. This test is performed by pulling the ring upward through the surface of the liquid.

The force needed for the ring to break the surface ( overcome the surface tension) is determined. This measurement is in Dynes/centimeter. The Tensiometer that is made for this purpose is the CSC Precision Tensiometer.

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

The Tensiometer for this test needs to pull the ring up through the boundary between the lower, higher density liquid, and the liquid thatCSC Interfacial Tensiometer is floating above. The force needed to break through the surface of the higher density liquid is recorded as interfacial surface tension.

To get the measurement of the force needed to break the boundary going from the floating liquid to the greater density liquid is measured by pushing the ring down through the boundary. This force is also measured in dynes/Centimeter and is also  interfacial surface tension.

The instrument used to do these tests is the CSC Interfacial Tensiometer.

Both of these tensiometers operate with a precision of ± 0.05 Dynes/CM.

Specifications of both tensiometers are detailed in our on-line store CSC On-Line Storeat CSC Precision Tensiometer and CSC Interfacial Tensiometer.

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Replacement duNouy Rings

Do you need rings?

For the Precision Tensiometer the part number is duNouy Tensiometer Rings70537000.

The Interfacial  number is 70542000.

You can order on-line at the CSC Store or by completing the form or calling us 703-876-4030 begin_of_the_skype_highlighting            703-876-4030      end_of_the_skype_highlighting

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Tensiometer Manual Download

Decorative & Hard Chrome

The CSCTensiometer helps decorative and hard chrome platers meet EPA regulations on chromium emissions. The regulations state that there is a direct relationship between surface tension and chromium emissions.

Results of the surface tension tests help the platers maintain bath conditions that meet EPA emission requirements.

More About Interfacial Surface Tension

We published a short piece discussing Interfacial Surface Tension

Here is the link to it.

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CSC Scientific Company, Inc
2799-C Merrilee Drive
Fairfax VA, 22031
800-621-4778
703-280-5142 (fax)
csc@cscscientific.com

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