Viscometer Searle’S Pattern (Viscosity OF A Liquid By The Co-Axial Cylinder)

Searle's Pattern Viscometer is a type of rotational viscometer commonly used to measure the viscosity of liquids, especially in industrial and research applications. It operates on the principle of measuring the torque required to rotate a spindle (inner cylinder) immersed in a fluid, while the outer cylinder remains stationary.

The inner cylinder is suspended by a torsion wire and immersed in the fluid sample. As the spindle is rotated, the resistance offered by the fluid (viscosity) causes a twist in the torsion wire. This twist is proportional to the torque needed to rotate the spindle, which can then be used to calculate the viscosity of the liquid.

The setup typically includes

A transparent cover with scale pans and releasing pins to allow for precise
torque application and measurement.

A slot that ensures secure and accurate positioning of the components
during the test. Supplied without weights.