• Force Balance Tensiometry

    DataPhysics force balance tensiometry (DCAT line)

    Based on the latest balance technology from Sartorious AG, the DCAT family of dynamic contact angle tensiometers benefit from a combination of maximum precision and the greatest possible stability. It is this balance technology that enables the weight-based determination of contact angle, surface and interfacial tension, critical micelle formation concentration, liquid density, sedimentation and penetration rate and lamella breakpoint (surface elasticity).

    Applicable to both solid and liquid samples, the DCAT range provide crucial data for production support, quality control, and R&D purposes across a vast range of application areas; wherever the physical/chemical interaction at a liquid/liquid or liquid/solid interface is of interest.

    Medical devices, absorbent powders, single fibres and fibre bundles, are candidate solid surfaces for subsequent chemical modification and/or coating.

    Introducing the DataPhysics DCAT 9 automated tensiometer.

    Employing both the Du-Nouy ring and/or the Wilhelmy Plate, the DCAT 9 facilitates the fully automated determination of the surface and interfacial tension of liquids, to a maximum temperature of 130°C.

    In addition, with the use of the appropriate accessories, the density of both solids and liquids can be measured on the same device. The tensiometer is equipped with a high precision electromagnetic compensation weighing system, which allows for automatic or manual (external) calibration, with certified reference weights.

    The manufacturer’s modular approach to both hardware and software will enable us to configure a system to match an individual customers, specific application, requirement to the tightest of budget constraints.

    DCAT 9 - room temperature operation

    DCAT 9T – includes a digital thermometer and liquid temperature control unit

    DCAT 15
    The DCAT 15 enables additional measuring methods and hence can be used to determine dynamic contact angles, the surface energy of solids or sedimentation and penetration properties. In addition the DCAT 15 can be extended with a liquid dosing unit LDU 25 and can thus create sequential concentration series of, for example, surfactant solutions. Without manual user intervention the critical micelle concentration (CMC) can be determined software controlled in a series of experiments.

    Main features

    • electrodynamic compensation weighing system with automatic and manual calibration function
    • software controlled, motor-driven height positioning of the sample receptacles with variable speed
    • automatic coupling lock for the balance
    • automatic crash protection for measuring probes during measurement
    • illuminated sample chamber
    • integrated magnetic stirrer
    • digital thermometer with connections for two Pt 100 temperature sensors
    • compatible with the liquid dosing unit LDU 25

    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.

    Due to the longer travel distance of the sample stage, an electrical temperature control unit can be mounted inside the DCAT 25 which makes measurements at temperatures of up to 250 °C possible. Moreover the Langmuir trough module can be used to investigate the surface pressure and the interfacial rheology of monolayers. The upgrade video system provides the opportunity to record video-sequences during force of adhesion measurements and to evaluate contact angle, contact area etc. in addition to the force. For an intuitive and fast device control even during complex measurements, a TP 50 control panel is included in the delivery of every DCAT 25.

    Main features

    • high resolution electrodynamic compensation weighing system with automatic and manual calibration function
    • software controlled, motor-driven height positioning of the sample receptacles with variable speed
    • automatic coupling lock for the balance
    • automatic crash protection for measuring probes during measurement
    • closed illuminated sample chamber
    • integrated magnetic stirrer
    • digital thermometer with connections for two Pt 100 temperature sensors
    • includes a TP 50 control panel with touch screen and precision control wheel
    • compatible with the liquid dosing unit LDU 25
    • compatible with the electrical temperature control unit TEC 250/DCAT
    • compatible with the upgrade video system UpVideo DCAT
    • compatible with the Langmuir trough module LTM

    DCAT 25SF

    The DCAT 25SF incorporates a weighing system of highest accuracy with a resolution of 0.1 μg which allows to measure even on single fibres. As an ideal single fibre tensiometer the DCAT 25SF is not limited to this very special purpose due to the modular design of the product line.

    Main features

    • electrodynamic compensation weighing system of highest resolution with automatic and manual calibration function
    • software controlled, motor-driven height positioning of the sample receptacles with variable speed
    • automatic coupling lock for the balance
    • automatic crash protection for measuring probes during measurement
    • closed illuminated sample chamber
    • digital thermometer with connections for two Pt 100 temperature sensors
    • includes a TP 50 control panel with touch screen and precision control wheel
    • compatible with the liquid dosing unit LDU 25
    • compatible with the Langmuir trough module LTM

    The DCATS software is available in various independently usable modules. Please consult us for, method specific, applicability across DCAT 9 to DCAT 25SF.

      The available software modules for the DCAT 25 are:

    • DCATS 31 — surface and interfacial tension
    • DCATS 32 — dynamic contact angle
    • DCATS 33 — critical micelle concentration (CMC)
    • DCATS 34 — liquid density
    • DCATS 35 — sedimentation and penetration
    • DCATS 36 — solid density
    • DCATS 37 — adhesion
    • DCATS 38 — surface pressure

    For more information please refer to the DCAT product range