---
title: Surface Tension – Tensiometer Update
description: Surface Tension Update - Fischer Scientific ceases production of the Tensiomat©. CSC Scientific  Tensiometers are recommended as replacements.
---

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# [Surface Tension – Tensiometer Update](https://www.cscscientific.com/csc-scientific-blog/bid/57411/surface-tension-tensiometer-update)

 Written by [Art Gatenby](https://www.cscscientific.com/csc-scientific-blog/author/art-gatenby) | Apr 29, 2011 6:11:00 PM

This ramble is about changes in the **Surface Tension** Equipment landscape.

For decades it seems -- I guess it has been decades --[ CSC Scientific ](https://www.cscscientific.com/surface-tension/)(with the **Precision** and **Interfacial** Models) and Fisher Scientific (with the **Tensiomat**©) have shared success in supplying the need for liquid surface tension tensiometers throughout the World.

Fisher has periodically evaluated discontinuing **Tensiomat©** manufacture. This year, the company decided to **cease production.** The CSC Scientific ** [models](https://www.cscscientific.com/surface-tension/tensiometer/)** are recommended as replacements. Fisher Scientific can provide either of the CSC Scientific Tensiometers.

CSC has two Tensiometer models:

- **Precision Tensiometer** - Readings are obtained from an upward pull through the sample.

- **Interfacial Tensiometer** – Readings can be obtained from an upward pull or a downward push

The CSC Interfacial Tensiometer is needed when interfacial tension is calculated between a less-dense fluid and a heaver one located below the interface. The ring is rigidly attached to the measuring arm to obtain a downward measurement. The Interfacial Tensiometer is also recommended when the tested material is a thick liquid. This more easily facilitates setting up the ring below the liquid surface.

One important consideration in the tensiometer transition is **the availability of duNouy Rings** to replace damaged ones. Several Tensiomat© customers have successfully used CSC-manufactured rings. *We believe that this will be the experience in most instances*.

**In order to further help with the transition**, we will repair Tensiomat© brand Tensiometers and will do so as long as parts are available.

**New replacement rings** (part number: 70537000) can be ordered directly from [our on-line store](http://www.cscscientific.us/Surface-Tension/Parts-Accessories) or by telephone at 800-621-4778. Of course, we can help you with a new unit. Also, we offer background and application information on our Tensiometer Models.

If you are a a user of CSC Tensiometers or are otherwise **not affected** by this discontinuation but have a colleague with a Tensiomat©, perhaps you can forward this article, thus providing them with a source for answers to questions about repairs and replacements.

We hope this has been helpful to you or to one of your colleagues.

A still somewhat dazed,

Art

P.S. Did you know that you can subscribe to these exposés, rants, raves and ramblings? *All you have to do is click on the RSS Feed symbol at the upper left *and you will get a notice when a new one is published. Or, if you prefer, you can also subscribe for e-mail notice by jotting your address in the box just to the right of the title.

[View full post](https://www.cscscientific.com/csc-scientific-blog/bid/57411/surface-tension-tensiometer-update)

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