Viscometer falling/rolling ball

Figure 20 ScheniBlic rqncsencaiion of (a) a falling batl viscometer and (b) a rolling-ball viscometer.

The falling-ball and the rolling-ball viscometers, shown in Fig. 20, are also simple devices for viscosity measurement. However, they do not qualify as rheometers but as indexers. 

PrtKess control and product quality coniroL These procedures are generally carried out using simple devices when only an assessment of viscosity is required. Capillary, falling- or rolling-ball viscometers, infinite sea viscometers (a rotating cylinder immersed in the sample), and free-fall... 

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