Searle-type rheometer

Figure 6.5 Illustration of a Searle-type rheometer with a concentric cylinder sensor to the right a cone and plate sensor. Courtesy G. Schramm [349], Copyright 1981, Gebruder Haake GmbH.

In the cone and plate rheometer, a cone-shaped bob is placed against a flat plate so that the fluid to be studied may be placed into the gap between the lower face of the cone and the upper face of the plate. Again, in the Searle method, the cone is rotated while in the Couette method the plate turns. In each case, the torque on the cone is measured. Figure 6.5 shows a Searle-type cone and plate arrangement. For this arrangement the shear stress is given by ... 

Reference measurements were conducted on a MARS rotational rheometer (Thermo Scientific), using a Z20DIN (DIN53019, Searle type) measuring system. 

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