Ostwald Viscometer

An Ostwald viscometer is a precise instrument used to measure a liquid’s viscosity, which is its resistance to flow. It consists of a narrow tube with marked levels, a bulb, and designated points for timing. A sample liquid is drawn into the tube, then allowed to flow through a narrow section under gravity. By measuring the time it takes for the liquid to pass between marked points, and knowing the liquid’s density, the viscosity can be calculated using a specific formula. This method provides accurate, reproducible results essential in chemistry and industries like pharmaceuticals and lubricants.