LA-950V2

概要

        LA-950V2 激光粒度仪是革命性的LA-950系统的第二代产品,完全继承了上一代卓越的测量性能,同时在易用性和采样系统方面有新的提高。

        其精确的测量结果在客户中享有广泛的声誉。

        完全重新设计的元器件使得整个设备的表现在速度,动态范围,精度上获得了广泛的提升。同时,基于客户的需求,LA-950V2 的新设计使得设备的采样系统更迅速,附件的扩充性更强。

        LA-950V2 根据您需求的不同有不同的版本可以供您选择。

特征

        LA-950V2 提供以下杰出的特点:

        目前最宽的测量范围:HORIBA革命性的光学系统设计提供了最宽的测量范围(0.01-3000um,达到了微小颗粒检测与大颗粒检测的完美统一。

        最高的检测精度,检测重复性保证:Horiba设计的高性能光学系统,结合新型元器件和优化算法,在软硬件两方面提供了目前激光粒度仪中最高的检测精度,重复性和分辨率。

  • 精度保证0.6%以内
  • 重复性保证0.1%
  • 精密光路和检测器设计保证了良好的仪器到仪器间的稳定性和重复性

软件特点 

        在数据显示,图形、尺寸、客户标志和报告显示打印上都可以做到客户订制。

        软件内置数据库能进行批操作和搜寻,从而对所有保存数据的搜选和操作非常简便。

        软件可以定义微指令程序,从而可以让用户针对同类样品和条件作成自定义的批处理程序,大大简化了批量检测的操作。

自我维护和自动检测系统软件

        快速的测量时间-60秒:高水准的设计和自动化的软硬件保证了测试的速度,重复性和易用性。整个样品的分析流程可以在60秒内完成。

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        最强大的采样系统:模块化的设计使得LA-950V2拥有多个适合不同应用范畴的采样单元供用户选择。

        标准化高功率的离心泵能有效地驱动起各种悬浮物甚至是高密度颗粒,内置超声波探针对黏附样品起到很好的分散作用。以上这些使得整个系统能够完善的完成样品的分散和分析。

        选配的采样单元能提供不同的取样容积,适合不同的有机溶剂,甚至是不同的水泵中来满足特殊的应用需要。

        最快速的采样系统互换: 独特的样品槽设计使得3个样品分散单元能同时放置于一个平台上。所以样品系统的互换就非常的简易和快速。少于10秒的时间并且不需要更换任何硬件。


制造: HORIBA

規格

        LA-950V2系列激光粒度仪因样品处理系统的不同和选配件的不同有多种配置。全系列的干湿样品处理系统和广泛的选择性配件能满足客户的订制需求。

        AquaFlow: 标配的循环容量,高功率离心泵,内建可调高功率130瓦超声波探针提供了完全的有效分散。内建进液泵和超声传感器将整个采样流程自动化。

        SolvoFlow: 具有AquaFlow版本的全部功能,同时能够使用有机熔剂。

测量技术

The LA-950 combines the most popular modern sizing technique with state of the art refinements to measure wet and dry samples measuring 10 nanometers to 3 millimeters. The central idea in laser diffraction is that a particle will scatter light at an angle determined by that particle’s size. Larger particles will scatter at small angles and smaller particles scatter at wide angles. A collection of particles will produce a pattern of scattered light defined by intensity and angle that can be transformed into a particle size distribution result.

The LA-950 laser diffraction instrument consists of two light sources (1 & 2), a sample handling system to control the interaction of particles and incident light, and an array of high quality photodiodes (3 & 4) to detect the scattered light over a wide range of angles- as shown below. The scattered light collected on the detectors is used to calculate the particle size distribution of the sample analyzed using Mie Theory (a Fraunhofer model is also built into the software if required, but is not typically recommended).

Two different wavelength light sources are required in order to extend the lower detection limit of the technique. The diagrams below show the 360° light scattering patterns from 50 nm (red line) and 70 nm (orange line) particles as generated using the 650 nm red laser (left) and 405 nm blue LED (right) in the LA-950.

The patterns are practically identical across all angles at 650 nm and the algorithm will not be able to accurately calculate the different particle sizes. But at 405 nm distinct differences are now seen on wide angle detectors which allows for accurate calculation of these size particles. The blue LED, optical configuration, and advanced electronics combine to make the LA-950 the highest sensitivity instrument on the market, capable of accurately measuring reference materials down to 30 nm.

Samplers are used to present the sample to the light sources under controlled conditions. An array of liquid samplers are available with different sample volumes to transport the sample and often utilize ultrasound as an energy source to break up agglomerates.  Dry powder feeders use compressed air as both a dispersive energy and driving force to transport the powder through the optics. A complete laser diffraction system must include one sampler, and often includes several in order to match the sample presentation to the application requirements. The diagram below shows a schematic of the default liquid sampler built into the LA-950.

The last component of the LA-950 diffraction system is the software which converts light scattering to particle size and controls the instrument. A single display screen provides the operator with all controls required to perform quick, simple manual measurements. Advanced software features including the unique Method Expert Wizards provide automation and advice to aid novice users to become adept at creating robust, reproducible methods that can be easily transferred to additional users and locations.

 

应用

 

The LA-950 is being used in dozens of applications for research, quality control, and production. Find your application for this technology in the Applications Center.

Brochures

LA-950 -激光散射粒度分析仪

Downloads

Why HORIBA Particle Characterization?

The Method Expert - Guided, Automated Method Development (registration required)

Optimization of Dry Powder Particle Size Analysis (registration required)

The HORIBA Guidebook to Particle Size Analysis

Browse through our extensive collection of Technical Notes, recorded Webinars, and much more in the Download Center.

Resources

LA-950 Performance - Comparison - Can Your Analyzer Do This?

LA-950 Performance - Precision - ANOVA Gauge R&R Study

LA-950 Performance - Accuracy - Measuring Mixed Standards

Discover the cutting edge research accomplished with the LA-950 in the Bibliography.

备件

 

The LA-950 was designed with the goal of measuring every possible application. To accomplish this goal several sample handling systems are available to best solve the user's application challenges.

PowderJet Dry Feeder

For powdered materials, the PowderJet Dry Feeder system provides a simple, yet effective, method for analyzing both free-flowing and cohesive dry powders. Automatic control of sample feed rate provides optimum dispersion, stability and ease of use. The adjustable power dispersion nozzle allows for measurements of all sample types from friable crystals to highly cohesive agglomerates. 

Why is the PowderJet the most advanced dry powder solution on the market?

  • Automatic feedback constantly adjusts sample delivery to maintain an even powder flow into the measurement zone
  • Patented sample preparation mechanisms control difficult samples to enhance measurement accuracy and precision
  • 40 levels of powerful 360° compressed air dispersion suitable for the most fragile and the most cohesive particles
  • Vertical design eliminates the cross-contamination that is unavoidable with horizontal designs
  • Installed on the top of the LA-950 to conserve precious bench space in your lab
  • Nearly maintenance free design eliminates the need for tools or complex cleaning procedures

These breakthrough advancements allow the PowderJet the highest level of precision, speed, and ease of use available on the market.

For more information, visit the Download Center and read Application Note 154 about Dry Method Development (registration required).

 

MiniFlow 

The MiniFlow is a fully-featured version of the SolvoFlow circulation system except that it has been miniaturized. By doing this the sample amount and dispersant volume are minimized and precious materials can be conserved. The MiniFlow features a variable 35 to 55 mL volume requirement, resistance to organic solvents, a built-in ultrasonic probe for dispersing highly agglomerated materials, automatic fill pump with level sensors, and automatic rinse system. The hands-free design eliminates frustration and safety hazards found with syringe-based systems prone to spills. 

The MiniFlow is ideal for measuring very precious samples, samples that are toxic or hazardous, where the waste volume should be minimized, for pharmaceutical or food applications requiring organic solvent dispersants, or oil dispersions for pigments, polymers and resin products.

For more information, visit the Download Center and read Application Note 176 about Minimizing Sample Quantity with the MiniFlow (registration required).

 FractionCell

The cuvette-style Fraction Cell allows liquid volumes as small as 10 mL to be measured, making it perfect for measuring very valuable, extremely small quantity, or hazardous samples.

 

PasteCell

The unique PasteCell is designed to handle samples with high viscosity or magnetism. The principle involves placing the sample between two measurement plates and pressing those plates together to "disperse" the sample evenly through the measurement zone. The PasteCell can solve application challenges too difficult for conventional sample handlers!

 

SlurrySampler

The SlurrySampler is a robotic sampling system that is fully integrated into the LA-950 control software. Capable of supporting 15, 30, or 60 individual samples with mechanical and magnetic mixing options, the SlurrySampler automates routine sample analysis.

When prompted by the software, the robotic arm moves to the correct position, mixes the sample, withdraws an aliquot, adds the aliquot to the sampling chamber, and then rinses itself to prevent contamination. Suspensions and emulsions can be measured using the SlurrySampler. An additional metering pump may be added to provide surfactant, pH, or salinity modification before sample addition.


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