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High Temperature Viscometer and Rheometer:
FRS

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Model:
  • Temperature range from 300 °C up to 1530 °C
  • Ideal for research and process optimization of slags, metals, and glass melts
    FRS Contact

    Materials which are in regular use in everyday life, such as glasses, ceramics, and metals, are processed or refined as melts at temperatures above 1000 °C. By determining the melt viscosity of these materials with FRS, you can achieve a consistent high quality of the final product and optimize the energy-intensive production process. These systems open up new possibilities in the R&D of materials with a high melting point. The Furnace Rheometer Systems (FRS) each combine a highly accurate air-bearing rheometer head and a lab furnace for high temperature viscosity measurements of melts at furnace temperatures up to 1800 °C (1730 °C sample temperature).

    For more information about the application of high temperature viscometer and rheometer, see this Wiki article.

    Key features

    Highest safety and easy sample loading

    Highest safety and easy sample loading

     The CE safety concept ensures full protection of the whole system. After the solid sample has been placed, the combination of pneumatic pre-positioning and the stepper-motor-driven fine positioning ensures a controlled and accurate immersion of the measuring system into the sample. This is done automatically as soon as the sample has been melted. During this process the operator is outside the safety cage, protected from the lab furnace, and works with the Anton Paar’s proven RheoCompass™ software, which supports fully automatic operation during high-temperature viscosity measurement, and enables simple reporting and evaluation of the results.

    Measure very low viscosities with the unique air-bearing motor

    Measure very low viscosities with the unique air-bearing motor

    25 years of experience in one motor – you only get this with rheometers from Anton Paar. The air-bearing-supported synchronous EC motor deploys a frictionless synchronous movement of the rotor inside which enables the most sensitive and therefore most precise movements at a large shear rate range. In this way, even low-viscosity samples can be measured using the high temperature viscometer and rheometer system – with unprecedented precision.

    Normal force control for detecting the melting point

    Normal force control for detecting the melting point

    The normal force sensor in the rheometer head allows for precise detection of the melting point during heating. The solidification point can be detected in the oscillation and rotation mode. Furthermore, the robust laboratory furnace with its air- and water-cooled system allows best-in-class temperature stability and accuracy of the sample temperature.

    Measure under inert gas atmosphere

    Measure under inert gas atmosphere

    With the FRS systems, you can either chose to measure under air, or also under inert gas atmosphere. The inert gas atmosphere protects the sample from unwanted chemical reactions, such as oxidation, during measurement with the high temperature viscometer and rheometer. 

    High temperature viscometer measurements in compliance with international standards

    High temperature viscometer measurements in compliance with international standards

    The furnace rheometer systems FRS are compliant with international industry standards: ASTM C965 (Standard Practice for Measuring Viscosity of Glass Above the Softening Point), and ISO 7884-2 (Glass Viscosity and viscometric fixed points; part 2: Determination of viscosity by rotation viscometers).

    Technical specifications

      Unit FRS 1600 FRS 1800
    Bearing - Air Air
    EC motor (brushless DC) with high resolution optical encoder - ✔ ✔
    Permanent torque (60 min), no signal drift - ✔ ✔
    EC mode (controlled shear rate and shear stress) - ✔ ✔
    Rotation mode - ✔ ✔
    Oscillation mode - ✔ ✔
    Measuring of newtonian samples - ✔ ✔
    Measuring of non-newtonian samples - ✔ ✔
    Maximum torque mNm 230 230
    Minimum torque, rotation nNm 10 10
    Minimum torque, oscillation nNm 2 2
    Torque resolution nNm 0.1 0.1
    Viscosity range Pa.s 0.001–107 0.001–107
    Angular deflection, set value µrad 0.1 to ∞ 0.1 to ∞
    Angular deflection, resolution nrad 10 10
    Minimum angular velocity rad/s 10-9 10-9
    Maximum angular velocity rad/s 314 314
    Minimum speed (CSS/CSR) 1/min 10-9 10-9
    Maximum speed FRS 1/min 300 300
    Maximum speed measuring head 1/min 3000 3000
    Minimum angular frequency rad/s 10-7  10-7 
    Maximum angular frequency rad/s 628 628
    Normal force range N 0.005 to 50 0.005 to 50
    Normal force resolution mN 0.5 0.5
    Dimensions mm 680 x 1950 x 920 mm 680 x 1950 x 920 mm
    Weight kg 120 150
    Oven temperature range °C 20, 300 to 1600 20, 600 to 1800
    Minimum sample temperature °C Room temperature Room temperature
    Maximum sample temperature °C 1530 1730
    Temperature gradient optimized - ✔ ✔
    Sample temperature sensor - Typ S or B Typ S or B
    Temperature resolution °C 0.1 0.1
    Safety housing - ✔ ✔
    Inert gas atmosphere possible - ✔ ✔
    Measuring system material - Al2O3, graphite, Pt, and customized Al2O3, graphite, Pt, and customized
    Measuring system rotor diameter mm 11 to 27.6 11 to 27.6
    Maximum measuring system cup height mm 100 100
    DMA™ Option - on request on request
    Compliant standards ASTM C965, ISO 7884-2 - ✔ ✔

    Standards

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    ASTM

    C965

    ISO

    7884-2

    Anton Paar Certified Service

    The Anton Paar quality in service and support:
    • More than 350 manufacturer-certified technical experts worldwide
    • Qualified support in your local language
    • Protection for your investment throughout its lifecycle
    • 3-year warranty
    Learn more

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