Difference between redwood viscometer no.1 and redwood viscometer no.2

The Difference between redwood viscometer no. 1 and redwood viscometer no. 2 are as follows

Redwood viscometer 1 Redwood viscometer 2
The jet orifice of redwood viscometer 1 has an internal diameter of 1.62mm and length of 10 mm. The jet orifice of redwood viscometer 2 has an internal diameter of 3.8 mm and length of 15mm.
It is used to determine the viscosity of less viscous oils having flow (efflux) time less than 2000 second. It is used to determine the viscosity of viscous oils having flow (efflux) time more than 2000 seconds.
The flow time of viscous oils is 10 times more than the flow time obtained by redwood viscometer2. The flow time of viscous oils is one-tenth of the flow time obtained by redwood viscometer 1.

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