... change does not affect the accuracy of measurement of viscosity 2 direct drive stepper motor, no noise, variable speed convenient, clear ... digital display (speed, rotor type . viscosity results) 2 Rotor Specifications: Rotor No. 1,2,3,4 (0 # rotor matched) 3 Measuring range ... : 152 / 2 ~ 10 ~ 2,000,000 (106) mPa.s 4 Accuracy: ± 1.0% full ...