Kapseliviskometria

Kapseliviskometria refers to the measurement of viscosity using a capsule viscometer. A capsule viscometer is a type of viscometer where the working fluid is contained within a sealed capsule. This design offers several advantages, particularly in handling hazardous or precious fluids where minimizing evaporation and contamination is crucial.

The principle of operation for a capsule viscometer often relies on observing the flow or deformation of the fluid within the capsule under controlled conditions. These conditions can involve applying a known pressure difference or subjecting the capsule to rotational or vibrational forces. The time taken for the fluid to flow a specific distance, or the magnitude of its deformation, is then correlated to its viscosity.

Capsule viscometers are employed in various scientific and industrial applications. They are particularly useful for measuring the viscosity of volatile organic solvents, sensitive biological samples, or high-purity chemicals where standard open-system viscometers would lead to unacceptable losses or degradation of the sample. The sealed nature of the device ensures sample integrity throughout the measurement process.

The calibration of a capsule viscometer is typically performed using standard viscosity fluids of known values. The design and specific measurement technique can vary, leading to different subtypes of capsule viscometers, each optimized for particular viscosity ranges or operating conditions. The accuracy of the measurement depends on precise control of temperature, the geometry of the capsule, and the accuracy of the time or force measurement.