A capillary rheometer is a specialized instrument used to measure the flow properties of materials, particularly fluids and polymers. It works by forcing a sample through a narrow capillary tube, allowing researchers to analyze how the material behaves under different shear rates. This information is crucial for understanding the viscosity and processing characteristics of various substances. These devices are commonly used in industries such as plastics, food, and pharmaceuticals to ensure quality control and optimize production processes. By providing precise measurements, capillary rheometers help manufacturers develop better products and improve efficiency in their operations.