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    LS-909 | 0.02-2100microns

    Update time:2016-09-20 11:17:00  Popular point:1671
    • uploads/image/20181205/1544019614.jpg
    • SCF-105B
    • DPF-110
    • SCF-126
    • SCF-108
    • Structure principle
    • Diffraction
    • test report

    Applications: Used to measure and analysis the particle size distribution of powders or suspension liquid.
    Standard Package:
    Option A: Mainframe + SCF-105(B) + DPF-110 + Software  -->Wet & Dry dispersions
    Option B: Mainframe + SCF-105(B)/SCF-108 +Software  -->Wet dispersions only
    Option C: Mainframe + DPF-110 + Software -->Dry dispersions
    SCF-126 is optional for small volume samples for wet dispersion.

    1. Theory: Mie scattering
    2. Measuring Range: 0.02-2100μm(wet), 0.1-2100μm (dry)
    3. Sample Feeding: wet/dry dispersion (automatic circulating)
    4. Repeatability: ≤0.5% (standard sample D50)
    5. Alignment: intelligent automatic alignment, accuracy: 0.2μm
    6. Measurement Duration: 1-2 minutes
    7. Detecting Channels: 91
    8. Light Source: International He-Ne laser, >2.0 mW, wavelength: 0.6328μm
    9. Analog digital conversion (ADC): 18bit
    10. Environmental Requirement:  
    Temperature: 5-35℃   Humidity:<85%
    11. Report Items:
    Particle size distribution table & graph, Average diameter, Median diameter, SSA, etc.
    12. Power supply: 200~240V AC 50Hz 80VA
    13. Dimension (L*W*H ):1320*340*360mm (mainframe)     1600*450*480mm (package)


    Technical features
    1. Reliable optical platform
    LS-909 adopts all-in-one housing design, aluminium alloy base and modular construction design, it’s dust-protected, water-proof and it can prevent stray light from the outside. Debugging tool is used for the mutual alignment of the auxiliary detectors and main detector, which can help to obtain more accurate optical energy data of large angle, the performance of instrument for testing small particles will be improved.
    2. Optimized single-lens optical path structure
    Light path adopts lens back Fourier transform structure, which breaks through the restriction of Fourier lens’ pupil, the scattered light from all angles even backscattered can be positioned and be received by detectors; and the refracting surface and reflecting surface in the optical path of single lens are minimized, which can further reduce the background noise to the lowest level when the instrument works, the signal to Noise Ratio in the measurement will be improved.
    3. High-performance imported He-Ne laser emitter
    Optical source adopts imported He-Ne laser emitter which owns better monochromaticity, high coherence, small divergence angle and good stability compared to other laser emitters, the optical quality is better, the device owns long service time as the preheating time is short.
    4. New design of spatial filter & the patent of integrated laser emitter
    We also adopt the patent design of integrated laser emitter (patent no.: 00228952.0) and new design of imported permanent magnet spatial filter which eliminates the effects from diffraction ring, combined with the stability test of laser output power and filtering smoothing technique which can get more accurate scattering light energy data, it can further improve the testing performance especially for large particles.
    5. High-sensitivity photoelectric detecting array
    LS-909 optimizes the photoelectric detecting array, the forward, side, large-angle, double backward and reverse detectors are included. All detectors are accurately placed on the focusing plane of Fourier, combined with large-angle, double backward and reverse detectors, which can realize perfect dynamic range, excellent resolving ability and sensitivity, accurate acquisition of optical energy information for small particles, the lower limit of measurement can reach 0.02μm.
    6. Long-focus Fourier lens
    LS-909 adopts 556mm long-focus Fourier lens, which makes the measurement window farther away from the plane of photoelectric detecting array, consequently, the scattering light signals of smaller scattered angles have enough space to be detected accurately, the recognition capability of the smallest scattering angle is 0.016°, the measuring capability for large particles can be enhanced, the upper limit can reach 2100μm.
    7. Intelligent automated alignment
    Intelligent software controls the automated alignment system, which ensures the accurate repeatability for repeated measurement. The accuracy can reach 0.5um, intelligent judgement for alignment function can avoid the deviation of measurement result compared with traditional measurement, the life of alignment mechanism can be longer.
    8. Advanced data collection and processing technology
    Using 8-channel simultaneous sampling to sample 18 bit ADC and sample & hold switch with ultralow leakage current, the full scale accuracy can reach 0.15%, the electric background is lower, combined with the offset function of electric background, it can help to get more accurate optical energy data, the resolving ability is also enhanced.
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