Going places the naked eye never could

Going places the naked eye never could

Going places the naked eye never could

Going places the naked eye never could

Product Info LUMiReader® PSA

he LUMiReader PSA instantaneously measures the extinction profile of the transmitted light across the entire length of your sample using the STEP-Technology. It may be recalculated in terms of clarification and particle concentration. 

Each LUMiReader contains an optical block and temperature control element. In addition, the specially designed PSA module also opens new horizons for high resolution particle sizing and allows you to measure the velocity distribution of separating particles. There is no need for you to know any material constants such as viscosity or density.

Our proprietary design ensures that the light strikes the sample across its entire height, ensuring maximum optical sensitivity and reproducibility. 

The optical detector assembly features micro-scale spatial resolution capable of accurately measuring even the smallest local changes instantaneously across the entire sample height.

This design eliminates the time-consuming and less accurate task of scanning your sample, allowing you to capture even very fast micro-changes occuring in your dispersion without mechanical vibration.

The LUMiReader also uses a patented tilt technology based on the Boycott effect. The well-known principle allows accelerated, real-time stability testing at gravity by tilting the sample from its normal upright position. The magnitude of acceleration (up to 10 times) depends on geometric factors, such as tilt angle, vial dimensions, and sample type.

Analyse in a wide range of viscosities, temperatures, and concentrations. With the advantage of looking at the entire sample from top to bottom instantaneously, you can observe and understand different stability/instability phenomena concurrently; for example, creaming, sedimentation coalescence, aggregation and flocculation at original product concentration.

Comes with state-of-the-art software SEPView (Click icon to find out more). 

The LUMiReader comes certified, factory pre-calibrated and is ready-to-go.


The LUMiReader PSA allows for the first time the determination of the volume based particle size distribution (ISO 13317) for emulsions and suspensions, without knowing the refractive index and without the assumption of spherical and homogeneous particle shape.

This opens new horizons for the characterization of industrial products, where often above parameters are not available or not applicable. The analyser applies LUM’s patented STEP-Technology, the measurement of space and time resolved extinction profile following a unique new multi-wavelength method.

Giving hydrodynamic particle density, separation velocity distribution and particle size distribution (ISO 13317) in addition to the direct stability result according to ISO TR 13097, the new LUMiReader PSA ]is one instrument for the comprehensive understanding of complex industrial products in an easy way.


In addition, the specially designed PSA-module allows you to measure the velocity distribution of separating particles. There is no need for you to know any material constants such as viscosity or density.

Velocity Distribution
Qv(v), qv(v)
  Intensity Weighted Particle Size Distribution QInt(x), qInt(x)   Volume Weighted Particle Size Distribution Q3(x), q3(x)
- Direct measurement, no calibration / no material properties   - Quantitative information about particle size distribution   - Quantitative information about particle size and volume fraction of each class
- Always available - fast information for quality control       - Conversion into mass or number distribution
- Qualitative information about particle size and polydispersity        


Application Areas

Carbon black
Crude oil
Fine chemicals
Gas oil
Pharmaceutical dispersions
and many more materials.


- Immediately see and understand even complex dispersion behaviour
- Measure stability directly
- Reduce separation analysis time up to 10-fold
- Get velocity distribution even for fast-settling particles
- Obtain volume PSD without having to know refractive index
- Calculate density of your dispersed particles
- Investigate temperature effects up to 60 °C
- Differentiate between the various instability mechanisms
- Handle any dispersing media: water, oils, organic solvents
- Uses disposable cells, customizable
- Easy to use

Accelerated phase separation   up to 10 times at gravity
Test time reduction through sensitivity   up to 250 times
Particle size distribution   500 nm to 300 μms
Observation time   0.5 s to unlimited
Conformity   ISO/TR 13097; ISO 13317; ASTM D7827, CFR 21 Part 11
Samples   1 sample
Volume   0.5 ml to 4.0 ml
Concentration   0.00015 Vol% to 75 Vol%
Density   up to 22 g/cm³
Particle size   200 nm to 2000 μm
Light source   multi-wavelength
Temperature control   ambient +3 °c to 60 °C, +/– 1K
Tilt   vertical to 5°, 10°, 15°, 20°, 25°, 30°
Cells   different material and optical path
Dimensions (WxHxD)   29 x 24 x 44 cm
Weight   11 kg
Power supply   24 V, Adapter (100 V to 240 V) included