Viscosity Measurement using Ostwald's Viscometer - Amrita University
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Ostwald's viscometer is a traditional viscometer to measure the viscosity of a liquid. It is a U-shaped glass tube. In one arm, the bulb A is connected with a fine capillary. The lower end of capillary is connected with a U-tube provided with a bulb B in the second arm. The bulb is necessary to maintain the hydrostatic pressure during flow of liquid. Through the capillary tube, the liquid flows with measurable speed. There are two marks C and D above and below the bulb A. The liquid flows under its own weight.