LUM Gmbh - LUMiFuge®

LUMiFuge® Product information

LUMiFuge® - The only direct and accelerated stability analysis

Run up to 8 samples simultaneously Get fast and direct stability measurements
Compare and predict the shelf-life of your emulsion and suspension Optimize your dispersant and emulsifier concentrations and type
Differentiate between various instability mechanisms See and understand your dispersion from top to bottom
Understand sediment consolidation and creaming layer formation Obtain dispersion fingerprints

The Stability Analyser LUMiFuge® provides you with the objective classification and quantification of demixing phenomena and with the easy and fast determination of stability and shelf-life of dispersions. It is the instrument of choice for process optimization, quality assurance and quality control as well as for process control related research and development.

On the basis of the patented STEP®-Technology, the device determines simultaneously the demixing processes of 8 different dilute or concentrated suspensions/emulsions. Even different sample cell types and physical references can be measured at the same time.The multisample analytical centrifuge LUMiFuge® accelerates the demixing process up to 2300 times compared to traditional test tube tests. Stability tests and shelf-life determinations of original dispersions are up to 2500 times faster than perfomed in a test tube under earth gravity. The analyser, established for many years, features an easy operation, high flexibility (samples, parameters) and large number of applications.

LUMiFuge® Technology

   STEP-Technology® – Allowing you to look at the whole sample.

Demixing phenomena, like sedimentation, flotation or consolidation are directly measured by the LUMiReader®, LUMiFuge® or LUMiSizer® due to the patented STEP-Technology.

This permits to obtain Space- and Time-resolved Extinction Profiles over the entire sample length of up to 12 different samples simultaneously. Parallel light (I0) illuminates the entire sample cell and the transmitted light I is detected by thousands of sensors arranged linearly across your whole sample from top to bottom with a microscale resolution. Transmission is converted into extinction by lg I/I0 and particle concentration may be calculated.

The unique STEP-Technology gives high flexibility to use different cells to match specific sample properties.

By means of the comprehensive database based PC-software SEPView the light intensity can be adjusted to the corresponding sample turbidity. Transmission profils are recorded as fast as each second or with time intervalls up to hours, displayed as a sequence on the screen.

Transmission date are automatically stored in a special designed database, together with all instrument settings and actual calibration data.

The speed of the centrifuge can be set at a constant value or programmed to change during the measurement in the range from 200 rpm to 4000 rpm. These rpm-values correspond to relative centrifugal forces (RCF) at the bottom of the cell of 5 to 2300 (RCF = centrifugal acceleration/earth gravity). Built-in temperature control covers all present and future applications.

Evaluation Features: The evolution of the transmission profiles contains the complete information on the kinetics of any concentration changes due to creaming, sedimentation, flocculation, coalescence or phase separation.

Based on these space- and time-resolved extinction profiles (STEP) demixing phenomena are quantified regarding clarification velocity, sedimentation and flotation velocity of particles, residual turbidity, separated phase volume (liquid or solid), sediment consolidation or dewaterability.

Furthermore, comprehensive infomation is obtained with respect to the multimodality or polydispersity of dispersed particles.

LUMiFuge® Software

   SEPView® - Your window to dispersion analysis

Windows 7 and 8 based plug and play, pack and go
Simultaneous instability index analysis for 12 samples in real-time Individual user customization
Full SOP concept (Creation, capture, data analysis) Windows Explorer based data management
Comprehensive database security and full audit log Complies with 21 CFR Part 11
8 different tools to understand (quantify)
even the most complicated dispersion:
- Time lapse measurement replay
- Dispersion fingerprint
- Clarification
- Instability index
- Phase separation
- Sedimentation and creaming velocities
- Particle density and size distribution
- First derivative of integral transmission

SEPView® is a comprehensive database driven software solution. Whether you want to perform particle size measurements, stability analysis, determine creaming or sedimentation rates, predict shelf-life, examine flocculation and sedimentation consolidation, determine the degree of magnetization of your dispersed particles, or accurately calculate the particle density: with the help of SEPView you can do all this and more.

SEPView controls the instrument and provides functions for data management, visualisation, analysis and result documentation.

All information (calibration data, programmed measurement methods, comments, transmission profiles, settings etc) is stored in one database, no file management required.

Fast access to validation and measurement results and sample information is guaranteed. Comparison of sample data from different measurements is easily achieved.

Different program components are provided for the qualitative and quantitative analysis of the samples, e.g.
- for the clarification
- the Integral Transmission
- for settling, creaming & consolidation
- the Front Tracking
- the PSA-Module for the calculation of the particle size distribution.

The included animation tool displays the recorded measurement data with programmable playback parameters for easy recognition & identification of complex separation phenomena. Standard database functions like import & export of measurements and results, filtration of database content by various criteria, user and database administration are supported by SEPView.

The program supports different languages and different systems of units. The modular and object oriented design of the software provides easy extension and customizing opportunities on customer's request, i.e. for special R&D or QC tasks. SEPView complies to CFR 21 Part 11 for special R&D or QC tasks.

LUMiFuge® Industrial Application

The modern measuring equipment made by LUM for comprehensive qualitative and quantitative characterization of dispersions is used in a large variety of different industrial and research facilities, dealing with innumerable materials.
To name few examples:
Crude oil
Heavy fuel
Ceramic material

Cosmetics and Pharmaceutical products:

  • Creams
  • Hair care products
  • Body care products
  • Veterinary medicine
  • Tooth paste


  • Baby and infant food
  • Dressings and sauces
  • Functional food
  • Beverages
  • Ketchup
  • Milk and milk products

Cosmetics and Pharmaceutical products:

  • Creams
  • Hair care products
  • Body care products
  • Veterinary medicine
  • Tooth paste

Lubricants and coolants

Paints, Lacquers, Pigments and Inks:

  • DIY- and industrial paints
  • Automotive lacquers
  • Printing inks
  • Pigment dispersions

Polymers and Latices, Sludges, Slurries, Technical Dispersions

LUMiFuge® Specification

Accelerated phase separation 6 - 2300 times compared to gravity
Dispersion stability analysis 23 years reduced to less than 24 hours
Consolidation measurements concentrated dispersions and sediments
Observation time 1 s to 99 h
Conformity ISO/TR 13097; CFR 21 Part 11
Samples up to 8 simultaneously
Volume 0.05 ml to 2.0 ml
Concentration 0.00015 Vol% - 90 Vol%
Particle density up to 22 g/cm³
Viscosity 0.8 – 108 mPas
Light source NIR, special versions
Temperature control 4 °C to 60 °C, +/- 1K
Cells different material and optical path
Dimensions (WxHxD) 37 x 27 x 60 cm
Weight 40 kg
Power supply 100 V/ 120V / 230 V, 50/60Hz