Tensiometer // DCAT product series

Product catalog summary

Introduction to Tensiometry
Tensiometry involves measuring surface and interfacial tension, which is the force that acts to minimize a liquid's surface area. This is achieved using devices like the Wilhelmy plate or Du Noüy ring, which measure the tensile force exerted by the surface tension. Tensiometry is advantageous over optical methods as it does not require transparent liquids or differing refractive indices.

Wetting Phenomena
Tensiometry can also assess wetting and dynamic contact angles on solid samples. By immersing and withdrawing a sample in a liquid, the advancing and receding angles can be determined using the Wilhelmy equation. The Washburn method is used for powders and fiber bundles.

Applications and Methods
Tensiometry is used for various applications, including density determination, sedimentation, penetration properties, adhesion, and surface pressure analysis. Surfactants, which reduce surface tension, are studied to determine the critical micelle concentration (CMC), the point at which micelles form.

DCAT Models Overview
The DCAT series offers dynamic contact angle measuring devices and tensiometers for various applications. Models range from entry-level (DCAT 8/9) to high-performance systems (DCAT 25/25SF), each with specific features like temperature control and advanced measurement capabilities.

DCAT 8 & 9
These models are entry-level devices for measuring surface and interfacial tension and density. The DCAT 8T/9T includes temperature control for temperature-dependent measurements.

DCAT 15
This model supports additional methods for dynamic contact angles and surface energy determination. It can automate CMC determination with the LDU 25 dosing unit.

DCAT 25 & 25SF
The DCAT 25 is a multifunctional instrument with high precision for surface and interfacial tension measurements. It supports measurements under controlled atmospheres and high temperatures. The DCAT 25SF is specialized for single fiber measurements.

Accessories and Software
The DCAT series offers a wide range of accessories for various measurement tasks, including standard test bodies, density determination sets, and temperature control units. The DCATSoftware provides an efficient workflow with customizable modules for different measurement types, supporting multilingual interfaces and automated data storage.

Technical Data
The document provides detailed technical specifications for each DCAT model, including weighing range, resolution, measurement capabilities, and compliance with international standards.

Catalog excerpts

Dynamic contact angle measuring device and tensiometer From entry level device to high performance measuring system for single fibres

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Te n s i o m e t r y – a n i n t r o d u c t i o n Surface and interfacial tension Surface tension acts to contract and minimise any liquid surface. If a surface is being enlarged by the formation of a liquid lamella, as a test body, such as a Wilhelmy plate or Du Noüy ring, is in contact with it, the surface tension exerts a tensile force that can be measured. Within a tensiometer this force is measured by a high precision weighing system and, hence, the surface tension of the liquid can be calculated. Surfactants and CMC Interfacially active compounds like surfactants consist of a hydrophilic...

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D C AT m o d e l s The DCAT models The dynamic contact angle measuring devices and tensiometer of the DCAT series are universal measuring devices, that allow to investigate numerous surface and interfacial properties (see introduction to tensiometry). Due to the compact and modular product design it is possible to find an individual and best suited combination of device model and accessories for any task. Liquid temperature control unit TV 70 Highest precision and reproducibility of the measuring results is guaranteed by well-established measuring techniques and weighing technology. Due to state...

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DCAT 25 The dynamic contact angle measuring device and tensiometer DCAT 25 is the multifunctional all-round instrument of the DCAT series. The weighing system is even more precise than that of the DCAT 9 and 15 and hence offers highest accuracy for the determination of surface and interfacial tension. A completely closed sample chamber enables measurements under inert gas or ionised atmosphere as well as with controlled relative humidity. Electrical temperature control unit TEC 250/DCAT with accessories Due to the longer travel distance of the sample stage, an electrical temperature control unit...

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Wide range of accessories Accessories for every task The modular design of the DCAT models makes it possible to find the right accessory for even the most demanding measuring situation. Standard test bodies like Wilhelmy plates and Du Noüy rings are available in different sizes and allow for interfacial and surface tension measurements in compliance to a multitude of national and international standards. For regular verification of the high performance weighing system, 1 reference weights with DAkkS certificate can be used. angle measurements on plates, films, fibre bundles, powders and even...

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Innovative software Software for an efficient workflow DCATS 35 — sedimentation/penetration • determination of the sedimentation rate, yield forces, the penetration resistance and rate The newly developed, Windows® based, DCATSoftware is available in various independently usable modules, and is operable either traditionally, using mouse and keyboard, or on multi- touch notebooks/pads by finger or pen. The modern user interface is multilingual (English, German, Chinese), highly customisable and offers every user an individual and ideally suited overview during measurements. The comprehensive integrated...

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Available measuring methods and technical data DCAT 8 Weighing range resolution; accuracy measuring value rate [values/s] Surface and interfacial tension [DCATS 31] measuring range ring correction options Huh-Mason, Zuidema-Waters, Harkins-Jordan, Lunkenheimer factor, linear, polynomial, none Density determination liquid density [DCATS 34] solid density [DCATS 36] measuring range Dynamic contact angle [DCATS 32] measuring range Automated CMC determination [DCATS 33] Sedimentation and penetration [DCATS 35] Upgrade video system UpVideo DCAT Surface pressure [DCATS 38] Sample stage motorised with...

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DataPhysics Instruments GmbH • Raiffeisenstraße 34 • 70794 Filderstadt, Germany phone +49 (0)711 770556-0 • fax +49 (0)711 770556-99 [email protected] • www.dataphysics-instruments.com © Copyright by DataPhysics Instruments GmbH, Filderstadt. Technical information is subject to change. Errors and omissions excepted. is a registered trademark of DataPhysics Instruments GmbH DS/DCAT – 21-07 – 2.0/En Photos: Norbert Heil, Daniel Maier, Dreamstime. Artwork and layout: Daniel Maier

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Tensiometer // DCAT product series

Tensiometer // DCAT product series

Catalog excerpts

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