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Dual-Light Nano Particle Sizer

Description: Laser Particle Sizer specially designed for submicron and nano particle size testing. Principle: Dynamic Light Scattering (DLS)
Catalog Number: Dual-Light Particle Sizer
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  • Voltage:
    220V 110V
  • Warranty:
    Standard 1 year 2 year 3 year 4 year 5 year
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Laser Particle Sizer with dual wavelenth specially designed for submicron and nano particle size testing.
Emulsions, Liposomes, Ceramics, Abrasives, Inks, Paints, Nanoparticles, Clay
High detection sensitivity
Blue Laser and Green Laser for more applications
Real time detection
Fully automatic operation
Catalog No. Genizer Dual-Light Particle Sizer
Description Dual-Light Nano Particlr Sizer 
Size Range 1nm-10μm
Dimensions A x B x C 250mm × 150mm × 460mm                             
Weight 15kg                                               
Accuracy <1%                                                            
Application Emulsions, Liposomes, Ceramics, Abrasives, Inks, Paints, Nanoparticles
Standard Features
Control&Data Collection System Connecting to a computer with LPSA software
Voltage 110V/220V 50/60Hz
Temperature 0℃-79.9℃±0.1℃
Concentration Range 0.1mg/mL-100mg/mL
Scattering Angle Vertical
Sampling Time Less than Four Minutes
Detector Photomultiplier tube (PMT)
Warranty 1 year against any manufacturing defects
Option Features
Precision UPS voltage stabilizer
Clean Ultrasound Washer
The effect of the color on the size measurement


Light Source

Sample without color Sample in Red color Sample in Green color
Green Laser 100.662(±0.249)nm 88.514(±0.342)nm 100.668(±0.350)nm
Blue laser 100.914(±0.346)nm 102.250(±0.525)nm 112.024(±1.504)nm
For the colored sample, to avoid large deviation on the particle size measurement, the user should select the suitable light source. Analyzing the UV-Vis Absorption Spectrum is a useful aid for the selection of light source. If limited by the spectrum analyzer, the operator can simply switch the laser source between the blue light and green light base on the concept that the color with longer wavelength is prone to absorb the light with shorter wavelength. In general, the blue laser is recommended for the sample in red, orange, yellow color; and the green laser is recommended for the sample in green, blue and purple color.
What is the advantage of the Genizer Dual-Light Particle Sizer?
Simple: Sample preparation and analysis software is easy to operate
Dual: Dual wavelength laser for wider range of sample
Sensitive: High detection sensitivity, accurate precision and rapid measurement
Instant: Real time detection of dynamic changes of the sample
Intelligent: Fully automatic operation

Refractive Index
1. Temperature correction of refractive index
Generally speaking, for eachdegree Celsius of temperature increase, the refractive index of liquid organic compounds decreases by 3.5×10-4-5.5×10-4. For some liquids, especially when the temperature of refractive index is close to its boiling point, the temperature coefficient can reach 7×10-4. In practice, the refractive index measured at one temperature is often converted into the refractive index at another temperature. In order to facilitate the calculation, 4.5×10-4 is generally regarded as the temperature change constant. There might be aslight errorin the rough calculation, but it has reference value. In other words, the refractive index decreases with the increase of temperature, and the refractive index changes about 0.00045 for each degree change of Celsius temperature. Correct the reading for refractive index at 20°C using the following formula:
nD(t) = nD(20) - 0.00045(t-20°C)
nD(t) is the refractive index measured experimentally at temperature t. This shows that when the experimental temperature is higher than 20°C, nD(20) is larger than nD(t), while when the experimental temperature is lower than 20°C, nD(20) is smaller than nD(t).
For example, nD(t) =1.3667, t=25.2°C, calculate nD(20)
nD(t)=nD(20) - 0.00045(t-20°C)
nD(20)=1.3667+0.00045(25.2°C -20°C)
=1.3667+0.00045 × 5.2

2. Factors affecting refractive index
2.1  Wavelength of Light   
The refractive index of materials varies with the wavelength of light. The greater the wavelength, the lesser the refractive index. When measuring, the white light is usually applied. And when the white light refracts through the prism and sample solution, due to the different wavelength and degree of refraction of each color light, it decomposes into a variety of color light after refraction, which is called “dispersion”. The dispersion of light will make the boundary between the light and shade of the field of vision unclear, resulting in measurement errors. In order to eliminate dispersion, a dispersion compensator is installed at the bottom of the Abbe refractometer observation tube.
2.2 Temperature
The refractive index of a liquid is dependent on the temperature. As temperature increases, the fractive index decreases, and vice versa. The scale on the refractometer is engraved at the standard temperature of 20°C, so it is better to measure the refractive index at 20°C. Otherwise, the temperature correction factor should be applied. When the temperature is over 20°C, add the correction factors, and when the temperature is below 20°C, subtract the correction factors.

Name Molecular Formula Temperature °C Refractive Index nD
Propanol CH3COCH3 20 1.3593
Methanol CH3OH 20 1.329
Ethanol C2H5OH 20 1.3618
Benzene C6H6 20 1.5012
Carbon Disulfide CS2 20 1.6276
Carbon Tetrachloride CCl4 20 1.4607
Chloroform CHCl3 20 1.4467
Ether C2H5·O·C2H5 20 1.3538
Glycerol C3H8O3 20 1.473
Turpentine   20.7 1.4721
Olive Oil   0 1.4763
Water H2O 20 1.333
Name Molecular Formula Temperature°C Refractive Index nD
Water H2O 0 1.33395
Water H2O 5 1.33388
Water H2O 10 1.33369
Water H2O 15 1.33339
Water H2O 20 1.333
Water H2O 21 1.3329
Water H2O 22 1.3328
Water H2O 23 1.33271
Water H2O 24 1.33261
Water H2O 25 1.3325
Water H2O 26 1.3324
Water H2O 27 1.33229
Water H2O 28 1.33217
Water H2O 29 1.33206
Water H2O 30 1.33194
Water H2O 35 1.33131
Water H2O 40 1.33061
Water H2O 45 1.32985
Water H2O 50 1.32904
Water H2O 55 1.32817
Water H2O 60 1.32725
Name Molecular Formula Temperature°C Refractive Index nD
0% Ethanol 100%Water C2H5OH 20 1.333
10% Ethanol 90% Water C2H5OH 20 1.339
20%Ethanol 80% Water C2H5OH 20 1.3447
30%Ethanol 70% Water C2H5OH 20 1.35
40%Ethanol 60% Water C2H5OH 20 1.3545
50%Ethanol 50% Water C2H5OH 20 1.3583
60%Ethanol 40% Water C2H5OH 20 1.3612
70%Ethanol 30% Water C2H5OH 20 1.3634
80%Ethanol 20% Water C2H5OH 20 1.3648
90%Ethanol 10% Water C2H5OH 20 1.3657

D10, D50, D90: Refer to the size value of the particles at 10%, 50% and 90% cumulative volume respectively.
V%: The cumulative volume percentage, which corresponds to the curve of the rising trend.
S%: The volume percentage corresponding to a histogram or undulating curve.

Operating environment: 5-35°C (temperature), <85% ( relative humidity)

The equipment is recommended to be placed in a clean, dry and constant temperature room.