A Falling Ball Viscometer is a device used to measure the viscosity of a fluid. It operates by dropping a ball through a liquid and timing how long it takes to fall a certain distance. The viscosity is calculated based on the ball's size, density, and the time it takes to travel through the fluid. This instrument is commonly used in laboratories and industries to assess the flow properties of various liquids, including oils and polymers. The results help in quality control and product formulation, ensuring that fluids meet specific performance standards in applications like automotive and food processing.