Viscosity measurement refers to the process of determining a fluid's resistance to flow. This property is crucial in various industries, including food, pharmaceuticals, and petroleum, as it affects how substances behave during processing and application. Viscosity can be measured using different methods, such as capillary viscometers and rotational viscometers, which provide insights into the fluid's characteristics. The results of viscosity measurements are typically expressed in units like Pascal-seconds (Pa·s) or centipoise (cP). Understanding viscosity helps engineers and scientists optimize formulations, ensure quality control, and improve product performance in real-world applications.