| abstract |
The appts. to emulsify a material has a monitor (30) to measure the power and/or electric current and/or torque to rotate at least one stirrer (10,11) in the vessel (3), to provide measurement values. Also claimed is an operation where the material is heated in a vessel (3) to be stirred by at least one stirrer (10,11), and at least one stirrer is cooled during at least part of the stirring action. The power requirement for the stirrer is measured to give values. USE/ADVANTAGE - The system is to give an emulsion of two materials which do not mix well, such as water and oil or grease, such as in the prodn. of pharmaceutical and cosmetic preparations. The operation gives a constant monitoring action to determine the viscosity of the material through actual measurements of the power at the stirrer. |