Question

Difference between saybolt viscometer and redwood viscometer

Answer 1

A Redwood viscometer is another efflux type viscometer (Fig. 7.1.4-b) that works on the same principle of Saybolt viscometer. Here, the stopper is replaced with an orifice and Redwood seconds is defined for collection of 50ml of liquid to flow out of orifice. Similar expressions can be written for Redwood viscometer