Viscometers and Rheometers are instruments used to measure the viscosity and flow properties of liquids and semi-solids. Viscometers determine the resistance of a fluid to flow under specific conditions, while rheometers provide more detailed analysis of the material’s flow behavior and rheological properties, including shear rate, elasticity, and viscosity under varying stress and temperature. These instruments are vital in industries like food, pharmaceuticals, chemicals, and materials science, where precise control over fluid properties is essential.