Viscometers are essential instruments used to measure the viscosity of fluids, providing critical data on a substance's flow behaviour. Viscosity, which reflects a fluid's resistance to flow, is a key parameter in various industries, including food and beverage, pharmaceuticals, and petrochemicals. Different types of viscometers exist, including rotational, capillary, and falling ball models, each suited for specific applications and fluid characteristics. Rotational viscometers, for example, measure viscosity by assessing the torque required to rotate a spindle in the fluid, while capillary viscometers determine viscosity based on the time it takes for a fluid to flow through a narrow tube. Many modern viscometers feature digital displays and automated features for ease of use and improved accuracy. By providing reliable viscosity measurements, these instruments play a vital role in quality control, formulation development, and research.