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DVNext 锥板流变仪

DVNext CP

DVNext 锥板流变仪,现在具有磁性锥板选项

DVNext Wells-Brookfield锥板流变仪为研究人员提供了一种精密的仪器,用于常规测定小量样品中流体的绝对粘度。它的锥形和板式几何形状为开发完整的流变数据提供了必要可靠的精度。

特性和优点

  • 测定小量样品的绝对粘度(0.5 - 2.0 mL)
  • 精确的剪切速率,以确定材料的流动曲线行为
  • 由于样本量小,可快速控温
  • 磁耦合附件,简化转子的连接和拆卸
  • 电子间隙调整,简化了设置,并提高测试效率
  • 可在DVNext流变仪上使用触摸屏显示
  • 自动调零功能确保扭矩测量精度
  • 自动量程功能,可界定所有转子/转速组合的全量程(FSR)
  • 扭矩测量精度:全量程的±1%
  • 17025校准(可选)


操作原理

DVNext Wells-Brookfield锥板流变仪是一个精密的扭矩计,以离散的转速驱动。扭矩测量系统由一个校准过的铍铜弹簧组成,弹簧将驱动机构连接到一个旋转的锥转子上,感应锥转子和固定平板之间存在的样品流体引起的旋转阻力.

锥转子的旋转阻力产生的扭矩与流体中的剪切应力成正比。该读数可从预先计算的量程图转换为绝对厘泊单位(mPa·s)。另外,粘度可以从已知的圆锥几何常数、旋转速率和应力相关的扭矩中计算出来。

正确的锥转子和平板的相对位置可通过一个简单的机械程序获得,不需要外部仪表或辅助设备。

固定平板构成可拆卸的样品杯底部,注入0.5 ml至2.0 ml的样品液(视所使用的锥转子而定),重新装入时不会影响校准。样品杯有夹层,并且有连接到恒温循环槽的管配件。

该系统的精度在全量程的±1.0%以内。重复性在±0.2%以内。工作温度范围从0℃到100℃。

多种锥转子适用于DVNext Wells-Brookfield锥板流变仪。所有选配的锥转子均将使用相同的样品杯进行校准


多功能性应用

DVNext Wells-Brookfield锥板流变仪提供了多种剪切速率和粘度范围,可以通过使用可互换的锥转子进一步扩展。可以选择不同的机型来满足所需的特定粘度范围和剪切速率。

剪切速率可高达1875 sec-1 (DVNextCP)。

所需的小样品量允许对样品用量有限的材料进行流变学评价,如生物流体和含有贵金属的厚膜涂层。

所有湿润的部件都是不锈钢,耐腐蚀,易于清洗。可选配清洗接头、luer接头和嵌入式温度探头。

升级的间歇调节设置

DVNext Wells-Brookfield锥板流变仪具有先进的电子间隙设置功能。这种技术使得间隙的设置时间更短,并将间隙调整误差的可能性降到最低。只需转动测微计调整环,就可以设置间隙,从而减少了手动检测方法所需的时间。

新的电子间隙设置系统现在是DVNext Wells-Brookfield锥板流变仪的标准配置。该仪器提供了精确的剪切剖面,以确定粘度和开发流变数据。


了解什么是粘度

需要帮助?我们的培训部分可能正是您所需要的,这里可以为你澄清你不熟悉的术语,让你按照自己的方式更好地理解粘度的概念。了解粘度及流变学的关系、什么是牛顿流体和非牛顿流体、以及Brookfield仪器如何能够改善您的生产工艺,等等。

帮我选择
无法确定最适合您的仪器?尝试一下我们的帮我选择的选型过程指南、转子构建的考虑因素以及其他有用的信息,帮助您在选择设备时做出明智的决定。

了解更多关于凝胶时间测定仪的功能

DVNext流变仪具有测量凝胶时间测定功能,使用独特的磁耦合连接玻璃棒到仪器即可测量凝胶时间。当达到凝胶时间时,显示屏显示凝胶时间和粘度换算值。玻璃棒与仪器轻松快速分离。如有需要,集成温度探针会提供放热曲线峰值数据。DVNext可以订购玻璃测量棒、带有用以在测试中快速定位玻璃棒浸没深度的可调节制动器的仪器支架以及温度探针。测试可通过人工或储存在仪器存储器中的程序来进行。


17025校准现在可用。

  • Features +


    • Determine Absolute Viscosity of Small Samples:
      Accurately measure the viscosity of samples as small as 0.5–2.0 mL, making this ideal for limited or precious materials.


    • Precise Shear Rates:
      Obtain detailed flow curve behavior of materials with precise shear rates, allowing for comprehensive analysis of fluid dynamics.

    • Rapid Temperature Control:
      Benefit from quick temperature adjustments due to the small sample size, enhancing efficiency and reducing wait times during testing.

    • Magnetic Coupling Attachment:
      Simplify spindle attachment and removal with a magnetic coupling system, streamlining setup and minimizing handling errors.

    • Electronic Gap Adjustment:
      Experience easier setup and increased throughput with electronic gap adjustment, reducing manual intervention and enhancing repeatability.

    • Touch Screen Display on DVNext Rheometers:
      Enjoy an intuitive user interface with a 7” touch screen display, offering direct access to all features and enhancing user experience.

    • Auto-Zero Function:
      Ensure precision torque measurement with the auto-zero function, which automatically calibrates the instrument for optimal accuracy.

    • Auto-Range Function:
      Automatically define the full-scale range (FSR) for all spindle/speed combinations, simplifying setup and ensuring accurate measurements across a wide range of conditions.

    • High Torque Measurement Accuracy:
      Achieve reliable results with a torque measurement accuracy of 1% of the full-scale range, ensuring consistent performance.

    • Exceptional Repeatability: Benefit from a repeatability of 0.2% of the full-scale range, providing consistent and reliable data across multiple tests.

    PRINCIPLE OF OPERATION

    DVNext Cone/Plate Rheometer operates by measuring the torque required to rotate a cone spindle immersed in a small sample volume of fluid. The resistance to the cone's rotation, caused by the fluid, is directly proportional to the shear stress. This torque is then used to calculate the fluid's absolute viscosity in centipoise (mPa·s). The precise relative position between the cone and plate is maintained through a simple mechanical setup without the need for external gauges.

    VERSATILITY OF APPLICATION

    DVNext Rheometer offers a broad range of shear rates and viscosity measurements, making it suitable for various applications. Its small sample volume requirement is ideal for testing materials where sample availability is limited, such as biological fluids or expensive formulations. The instrument supports multiple cone spindles, which can be calibrated for specific applications.

    ENHANCED CONTROL AND COMPLIANCE

    • Digital Leveling:
      Ensures consistent setup and accurate measurements.

    • 21 CFR Part 11 Compliance:
      Optional compliance for regulated industries, with features like electronic signatures, audit trails, and secure data management.

    • LIMS Connectivity:
      Optional Ethernet and LIMS connectivity for seamless integration with laboratory management systems.

  • Specifications +


    • DVNXLVCP or DVNXLVDJG Models:

      • Viscosity Range:
        • With Cone Spindle CPA-40Z or CPM 40-Z: 0.1 - 3K cP (mPa·s)
        • With Cone Spindle CPA-41Z or CPM 41-Z: 0.5 - 11K cP (mPa·s)
        • With Cone Spindle CPA-42Z or CPM 42-Z: 0.2 - 6K cP (mPa·s)
        • With Cone Spindle CPA-51Z or CPM 51-Z: 2 - 48K cP (mPa·s)
        • With Cone Spindle CPA-52Z or CPM 52-Z: 3 - 92K cP (mPa·s)

      • Sample Volume: 0.5mL to 2.0mL (Depending on the spindle used)
      • Shear Rate: 2.0N to 7.5N sec⁻¹ (Depending on the spindle used)
      • Speeds: RPM 0.01 - 250 with 2.6K increments

    • DVNXRVCJG or DVNXRVDJG Models:

      • Viscosity Range:
        • With Cone Spindle CPA-40Z or CPM 40-Z: 1 - 32K cP (mPa·s)
        • With Cone Spindle CPA-41Z or CPM 41-Z: 5 - 122K cP (mPa·s)
        • With Cone Spindle CPA-42Z or CPM 42-Z: 2 - 64K cP (mPa·s)
        • With Cone Spindle CPA-51Z or CPM 51-Z: 20 - 512K cP (mPa·s)
        • With Cone Spindle CPA-52Z or CPM 52-Z: 39 - 983K cP (mPa·s)

      • Sample Volume: 0.5mL to 2.0mL (Depending on the spindle used)
      • Shear Rate: 2.0N to 7.5N sec⁻¹ (Depending on the spindle used)
      • Speeds: RPM 0.01 - 250 with 2.6K increments

    • DVNXHACJG or DVNXHADJG Models:

      • Viscosity Range:
        • With Cone Spindle CPA-40Z or CPM 40-Z: 2.6 - 65K cP (mPa·s)
        • With Cone Spindle CPA-41Z or CPM 41-Z: 10 - 245K cP (mPa·s)
        • With Cone Spindle CPA-42Z or CPM 42-Z: 5 - 128K cP (mPa·s)
        • With Cone Spindle CPA-51Z or CPM 51-Z: 41 - 1M cP (mPa·s)
        • With Cone Spindle CPA-52Z or CPM 52-Z: 78 - 2M cP (mPa·s)

      • Sample Volume: 0.5mL to 2.0mL (Depending on the spindle used)
      • Shear Rate: 2.0N to 7.5N sec⁻¹ (Depending on the spindle used)
      • Speeds: RPM 0.01 - 250 with 2.6K increments

    • DVNXHBCJG or DVNXHBDJG Models:

      • Viscosity Range:
        • With Cone Spindle CPA-40Z or CPM 40-Z: 10.5 - 261K cP (mPa·s)
        • With Cone Spindle CPA-41Z or CPM 41-Z: 39 - 982K cP (mPa·s)
        • With Cone Spindle CPA-42Z or CPM 42-Z: 20 - 512K cP (mPa·s)
        • With Cone Spindle CPA-51Z or CPM 51-Z: 163 - 4M cP (mPa·s)
        • With Cone Spindle CPA-52Z or CPM 52-Z: 314 - 7.8M cP (mPa·s)

      • Sample Volume: 0.5mL to 2.0mL (Depending on the spindle used)
      • Shear Rate: 2.0N to 7.5N sec⁻¹ (Depending on the spindle used)
      • Speeds: RPM 0.01 - 250 with 2.6K increments
    Notes:
    • B = 1 Billion; M = 1 million; cP = Centipoise; mPa·s = Millipascal·seconds; mL = Milliliter; N = RPM

    *Viscosity range depends on the cone spindle selected.


  • DVNXHB Model:
    • Viscosity Range: 800 cP to 320M cP (mPa·s)
    • Speed Range: 0.1 - 250 RPM
    • Speed Increments: 2.6K
  • Video +