A rheometer is a scientific instrument used to measure the flow and deformation of materials, particularly liquids and soft solids. It helps determine how substances respond to applied forces, providing valuable data on their viscosity, elasticity, and other flow properties. This information is crucial in various industries, including food, pharmaceuticals, and materials science. Rheometers come in different types, such as rotational rheometers and capillary rheometers, each designed for specific applications. By analyzing how materials behave under different conditions, rheometers assist researchers and engineers in developing better products and optimizing manufacturing processes.