These instruments are for determining the viscosity of all oils, expressed in Redwood seconds at the temperatures of test as called for by IP 70. Both types of viscometers, Redwood No.1 and Redwood No. 2 electrical heating models are available.
Ref. Standard – IP 70
Redwood No. 1 Viscometer (AIM 526)
Redwood No. 2 Viscometer (AIM 528)