The Stability Analyzer (Multiple Light Scattering Instrument) TURBISCAN TOWER applies the principle of multiple light scattering. The intensity of transmitted and backscattered light received by the detector is directly determined by the concentration (volume percentage) of the dispersed phase and the average diameter (or the average diameter of particles/droplets/bubbles). By measuring changes in the intensity of transmitted and backscattered light, variations in concentration or particle size at a specific cross-section of the sample can be determined. This instrument can analyze a wide range of samples, with particle sizes ranging from 0.01 micrometers to 1 millimeter, and sample concentrations up to 95% by volume. 

The measurement probe of the Stability Analyzer (Multiple Light Scattering Instrument) TURBISCAN TOWER consists of a pulsed near-infrared light source (wavelength 880 nm) and two synchronized detectors: the transmitted light detector is used for studying transparent and clear products, while the backscattered light detector is used for studying highly concentrated products. The working principle of the instrument is as follows: the measurement probe collects data on transmitted and backscattered light, scanning every 20 micrometers over a length of 55 mm. The resulting graph characterizes the homogeneity of the sample in terms of concentration and particle diameter. By editing the number of measurements and repeatedly scanning along the sample, a fingerprint map characterizing the stability or instability of the product is obtained.

The data collection method of the Stability Analyzer (Multiple Light Scattering Instrument) TURBISCAN TOWER is scanning: data is collected every 20 μm along a scanning height of 55 mm. At ambient temperature, one scan is performed and data is collected every 20 seconds, with temperature control every 30 seconds. Up to 250 scanning programs can be set. Changes in particle size and position in the sample due to coalescence, flocculation, or agglomeration can be monitored in real time. This allows for the calculation of changes in the average particle diameter in the sample, the migration speed of particles, and changes in concentration due to particle migration, i.e., the variation in stratification thickness over time.

The feature of the Stability Analyzer (Multiple Light Scattering Instrument) TURBISCAN TOWER is that it measures without the need to dilute the concentrated dispersed phase. This ensures that the product meets the required technical specifications in terms of particle size and/or its concentration.

The Stability Analyzer (Multiple Light Scattering Instrument) TURBISCAN TOWER is equipped with a temperature regulation device that can control the temperature range between 4°C and 80°C, with a temperature control accuracy of ±0.1°C.

The software of the Stability Analyzer (Multiple Light Scattering Instrument) TURBISCAN TOWER can produce the following analysis results:

1. Curves of backscattered light intensity (BS) and transmitted light intensity (T) relative to time.

2. Curves of stratification thickness relative to time.

3. Particle migration speed and the hydrodynamic average diameter of particles.

4. Quantitative dynamic analysis of physical instability: curves of average particle diameter relative to time or sample concentration relative to time.

5. Mean free path of photons or mean free path of transmission, d (average diameter), phi (concentration - volume percentage), TSI stability index.

6. Dispersion degree. (Dispersion degree is an evaluation index for the dispersibility of solid powders; the smaller the value, the poorer the dispersibility).