The LUMiCheck works on the back-scattering principle. Light scatters when a dispersed phase (consisting of particles and droplets) has a different index of refraction than the continuous media. The intensity of the scattering light depends mainly on the index of refraction, concentration, and particle size.
By following minute fluctuations and changes in the light scattering intensity, you can measure any changes in your sample. The LUMiCheck measures the light that is back-scattered at the bottom cross-section of specially designed cuvettes as a function of time. The use of special high-powered light-emitting diodes ensures that the scattering signal is of highest quality.
You can then measure the light-scattering signal over any time period you want, using optical sensors that can detect even the smallest changes occurring in your suspension or emulsion in real time.