Stability analyzerIt is a precision instrument designed specifically for stability control and formulation research of liquid samples, widely used in fields such as medicine, cosmetics, food, petroleum, and chemical engineering. The core principle is based on multiple light scattering technology, which quantitatively analyzes the particle size distribution, concentration changes, and unstable phenomena (such as stratification, flocculation, and sedimentation) in the sample by measuring the changes in transmitted and backscattered light intensity. High precision detection can be achieved without diluting the sample.
Stability analyzerThe main advantages are:
1. Simple structure, sturdy and durable
Without complex mechanical moving parts such as motors and pumps, it mainly consists of glass tubes, metal/glass balls, and brackets.
Low failure rate, extremely low maintenance cost, and long service life.
2. No shear measurement
During the measurement process, the liquid is mainly influenced by the small ball driven by gravity, and almost no additional shear action is generated.
This makes it particularly suitable for measuring shear sensitive fluids (such as some polymer solutions, gel, biological fluids), avoiding structural damage or viscosity changes caused by shear.
3. Provide absolute viscosity value
Based on the laws of physics (Stokes' law), as long as the density, falling time, and instrument constant of the ball and liquid are known, the dynamic viscosity (mPa · s or cP) of the liquid can be directly calculated, which belongs to the absolute measurement method and does not require calibration with standard oil (but the instrument constant K needs to be calibrated by the manufacturer).
4. Suitable for high viscosity liquids
By selecting smaller balls with higher density (such as stainless steel balls) or using inclined designs (such as H ö ppler viscometers), the falling time can be effectively extended, allowing for accurate measurement of liquids with higher viscosity (up to tens of thousands of cP).
5. Good reproducibility and high accuracy
Under the conditions of good temperature control and standardized operation, the measurement results have high repeatability and reproducibility, making it a reliable tool for laboratory and industrial quality inspection.
6. Intuitive operation, clear principle
Visualization of the measurement process allows for direct observation of the falling behavior of the ball, facilitating teaching and understanding of viscosity concepts.