Dry wet 2-in-1 laser particle size analyzer

LS-909 typeDry wet 2-in-1 laser particle size analyzerIt is a product developed by Zhuhai Ouaike Instrument Co., Ltd. based on users' demand for high-performance instrumentsA new generation of domestically produced particle size analyzer that supports both wet and dry methods.LS-909 typeDry wet 2-in-1 laser particle size analyzerIntroducing a long focal length optical detection system, optimized dual backward and backward scattering light detector layout, upgraded analog-to-digital conversion signal acquisition system, innovative adaptive noise suppression algorithmImportHigh quality helium neon(He-Ne）GasLaser and other core components, while absorbingNew experiences in the development process of Topsizer Plus, combined withCalibration free design enables LS-The 909 laser particle size analyzer can meet the detection needs of a wider particle size range, with high automation, good repeatability, strong resolution, and low maintenance requirements. Its intelligent measurement and control analysis software, specialized customizable test report templates, and simple and easy-to-use report browsing, data comparison, and various data export functions make granularity testing analysis easy from now on.

Ouyang KeDry wet 2-in-1 laser particle size analyzer

purpose

Measure the particle size distribution of the sample. Can measure samples dispersed in liquids or particulate materials dispersed in gases.

working principle

A beam of parallel light encounters obstacles and particles during propagationtimeLight waves undergo scattering (diffraction) deflection, and the angle of deflection is related to the size of the particles. The scattering (diffraction) phenomenon can be observed through the Mie scattering theoryMie Theory or Fraunhofer diffraction theorydiffraction theory)To describe. The larger the particle size, the smaller the angle of light wave deflection; The smaller the particle size, the greater the angle of light wave deflection. The laser particle size analyzer performs particle size analysis based on the physical properties of this light wave.

Technical Features

1. Reliable optical platform

The LS-909 system adopts an integral outer cover, aluminum alloy base, and modular structure design, which has obvious dust, water, and external stray light prevention effects. It requires less maintenance and is simple and easy to implement. Using debugging fixtures to adjust the positioning auxiliary detector and main detector in one goofMutual positioning and more accurate positioning are beneficial for obtaining more accurate large angle light energy data, thereby improving the performance of instrument small particle testing.

2. Optimized single lens optical path structure

By adopting a Fourier transform structure behind the lens, the pupil constraint of the Fourier lens is overcome，Scattered light from all angles, including backscatter, can be detected and received by the detector with good consistency; And the refractive and reflective surfaces in the single lens optical pathMore advanced than other optical designsfewBackground noisemorelowImproved the signal-to-noise ratio during instrument measurement.

Schematic diagram of optical path principle

3. High performance imported heliumNeon（He-Ne)Gas laser light source

The system uses imported heliumNeon gasLaser, with better optical quality, more stable and reliable, shorter preheating time, and no need for instrument calibration. This imported laser adopts a hard packaging process, with no gas escape, and the laser tube does not need to be replaced during the instrument's lifespan. Gas lasers are suitable for more demanding analytical and testing applications, compared to semiconductor lasersforIt has the advantages of good monochromaticity, high coherence, small divergence angle, and strong stability, ensuring good stability of the instrumentTest sensitivity and resolution.

4. Design of New Spatial Filters andintegratedLaser emitter technology

OMEC high-performance He Ne gas laser (left) vs. conventional He Ne gas laser (right)

LS-909 light source adoptsintegratedThe design of laser emitter and imported spatial filter eliminate the influence of diffraction ring. Combining laser output power stability detection and filtering smoothing processing technology, scattered light energy data is more accurateaccurateThis further improves the testing performance of the system, especially for large particles.

5. Reasonable distribution and high sensitivity combination of photodetectors

The LS-909 laser particle size analyzer has deeply optimized and integrated the layout of photodetectors, forming a three-dimensional detection system consisting of forward, lateral, large angle, dual backward, and backscattered light detectors. All detectors areaccurateThe instrument is placed on the Fourier focusing surface and combined with the application of low-noise, large-sized detectors with large angles, backward and reverse directions, ensuring that the instrument hasultra-highThe dynamic range*The resolution and sensitivity of the instrument effectively ensure the accurate acquisition of scattered light energy information of small particles. The detection range of large scattering angles is expanded to over 160 degrees, and the lower limit of instrument measurement is 0.02 μ m.

6. Fu with long focal lengthstandLeaf lens

The LS-909 laser particle size analyzer uses a 556mm long focal length Fourier lens, which increases the distance from the measurement window to the photodetector plane, allowing the angle difference between small angle scattered light signals to be accurately recognized by the photodetector. Scattering angle recognition abilityThe lower limit is as small as0.016 degrees, enhancing the instrument's testing capability for large particles, with a measurement upper limit of up to3000μm。

7. Intelligent automatic alignment

Intelligent automatic centering system ensuresaccurateThe repeatability of optical alignment and multiple measurements. The automatic centering mechanism has an accuracy of 0.2 μ m and a faster speed. It can be used as part of automatic measurement or completed by clicking the mouse on the testing page. Intelligent judgment and automatic centering avoid the result deviation caused by poor centering in traditional granularity measurement, and can extend the lifespan of the centering mechanism.

8. Advanced data collection and processing technology

By adopting optimized synchronous 8-channel 18 bit ADC analog-to-digital conversion sampling technology and ultra-low leakage current sampling and holding switch, the full-scale electrical background recognition accuracy is better than 0.15%. Combined with electrical background compensation function, it is beneficial to obtain more accurate light energy data, improve the dynamic range of light energy acquisition, and correspondingly enhance the testing resolution.

9. Dual injector ports, intelligent dry wet quick switching

The LS-909 host adopts a dual injector port design, which can simultaneously connect and configure dry and wet automated injectors. The software automatically recognizes and can quickly switch to select the injector to be tested. Configurable injector window base to prevent contamination during window switching. Combining easy to switch window design and high-precision and fast automatic alignment, the conversion between dry and wet testing is simple and fast.

A high-performance, easy-to-use dry testing system

The LS-909 dry injection system consists of a dry injector, a fully enclosed injection window, a silent pump air compressor, an oil-water filter, and a vacuum cleaner.

DPF-110 Automatic Dry Sample Injector

Technical characteristics of DPF-110 automatic dry sampling system

1) The communication recognition between the injector and the host, when used in conjunction with software, can achieve automated SOP testing functions, including automatic positive and negative pressure switches, automatic feeding, automatic sample measurement, and automatic cleaning.

2) It can support input pressure of 0-8 bar, dispersion tube pressure of 0.5-5 bar, high-precision stepless continuous adjustment, and also supports 0 dispersion pressure measurement samples. Built in distributed pressure sensor, with monitoring and tracing functions for distributed pressure during testing, and providing reminders for occasional undervoltage test results.

3) Automatic recognition of sample dispersion status, with automatic filtering function for over limit shading rate and abnormal warning function.

4) The hopper has a capacity of 30mL. The sample tank is designed with multiple adjustable mechanisms such as hopper tilt angle, feeding vibration rate, and graduated throttle valve. The feeding rate of the hopper is controlled by software and continuously adjustable, which can adapt to powder samples with different flowability.

5) Design of fully enclosed sampler with noise reduction function to isolate powder contamination on the instrument host and meet maintenance requirementsveryLess. The positioning design of the jet tube based on aerodynamics makes it difficult for the powder to contaminate the window glass, effectively ensuring the efficiency and accuracy of dry testing results, and significantly reducing the need for window cleaning.

6) The dispersion tube of the injector is made of corundum ceramic material, which has good dispersion effect and long working life, avoiding the fatigue and vulnerability problems of metal dispersion tubes.

7) Dedicated dry process window with airflow protection function and high hardness scratch resistant optical glass window,significantReduced window maintenance and cleaning work, and improved the service life of window glass.

8) Modular design, convenient for inspection and maintenance.

High performance wet cycle sampling system

SCF-105B fully automatic wet circulation sampler

Technical characteristics of SCF-105B fully automatic wet cycle injection system

1) The automated sampler standard for wet testing has a simple and smooth appearance design, beautiful appearance, and saves desktop space.

2) Adopting a self-priming pump for water inlet, it has automatic water inlet, automatic drainage, automatic exhaust bubble, and automatic cleaning functions. You can also choose a configuration that is compatible with tap water inlet.

3) The sample pool made of thickened 316L stainless steel material has corrosion and deformation resistance, and adopts an open design for easy operation.

4) The injector communicates with the host, and all control and operation functions are implemented through software.

5) Adopting a circular belt drive and centrifugal pump structure, it has the advantages of high circulation efficiency, low noise, large flow rate, and fast flow velocity.

6) Swiss imported motor, durable and long-lasting. According to the speed measurement device, the speed is controlled without changing over time, 0 - 4000r/min continuously adjustable.

7) The volume of the circulation sampler is about 500mL, and the flow rate of the circulation pipeline isreachable2.5L/min。

8) The bottom of the sample pool is equipped with an ultrasonic function, with an ultrasonic power of up to 50W. The ultrasonic power and time are continuously adjustable and have ultrasonic power compensation function.

9) Modular design, convenient for inspection and maintenance.

*Can be paired with SCF-108A according to user needsHigh performance wet cycle samplerSCF-126B corrosion-resistant micro wet circulation sampler

Intelligent, user-friendly, and versatile computer software features

1) Modularization of software design, visualization of instrument status, and user-friendly operation interface. The process interface is clear and has navigation function. The instrument has intelligent automation function, self checking function and can automatically identify the injection system; Before each measurementMayAutomatic measurement of electrical background effectively eliminates the impact of electrical noise on test results.ConfigurationFully automatic wet circulation samplerWhen using SCF-105B and DPF-110 automatic dry sampler, fully automatic wet and dry particle size testing can be achieved respectivelyManual sample testing also has clear navigation interface guidance.

2)

Having SOP standard operating procedures to reduce the impact of human factors and standardize the analysis and testing process.

3) The software has optional automatic alignment, manual alignment, and intelligent judgment alignment functions, which can be adjusted according to the instrument status information, making testing more time-savingMore efficient.

4) Provide multiple testing reports, including measurement records, particle size testing reports, screening testing reports, percentage testing reports, fitting reports, trend reports, and statistical reports, and can provide real-time statistical results for multiple testing records. In addition, it also supports custom industry testing reports and has typical report templates for industries such as hydrology and cement. The test report can be exported asPdf、Excel、WWord format or other text formats, report charts can be directly copied by right clicking.

5) Multiple data analysis models to meet the testing needs of samples with different characteristics. The volume distribution, surface area distribution, length distribution, and quantity distribution can be converted into each other. Personalized feature particle sizes can be set and displayed according to user needssettingDifferential and cumulative distribution percentage of particle size range.

6) Multiple test results and report pages can be viewed simultaneously for graphical comparison and numerical statistical analysis of data. Support classification, sorting, and filtering functions based on multiple parameters such as date, feature particle size, or average result, and output them in tabular form.

7) *An open sample parameter database with over 200 common material optical parameters. Users can also customize sample materials and their physical properties, including the real and imaginary parts of refractive index (corresponding to the absorption rate of the sample). It has the function of automatic matching of refractive index and can be added to the parameter database.

8) Rich custom report functions, convenient for users to flexibly obtain data and customize report styles. Users can flexibly customize the title of the reportLogo， Select the result modules to be displayed in the report and configure them accordingly. If the number of columns, sub reports, and coordinate axis ranges can be customized and adjusted, and the report content and parameter fields can be set as needed.

9) Provide complianceGMPThe software solution required by the attachment "Computerized System" is compatibleCFDA/FDA cGMP 21CFR part 11and211 The required user grading, permission management, data integrity, and traceability functions.