QTY. 1. FANN INSTRUMENT COMPANY VISCOMETER MODEL: 35A, PART NO: 207198, SERIAL NO: 10094423, POWER: 115 VOLTS, HERTZ: 60, WATTS: 90, EAD MOTORS, HYST SYN MOTOR, NO: H34BDBQ-12, DATE CODE: 0440, POWER: 115 VOLTS, HERTZ: 60, PHASE: 1, 40A CL F, RPM: 900/1800, CONT. DUTY, 6 MFD, 330 VAC. THE FANN MODEL 35 VISCOMETER IS WIDELY KNOWN AS THE "STANDARD OF THE INDUSTRY" FOR DRILLING FLUID VISCOSITY MEASUREMENTS. THE MODEL 35 VISCOMETER IS A VERSATILE INSTRUMENT FOR RESEARCH OR PRODUCTION USE. IN THE SIX-SPEED MODELS, TEST SPEEDS OF 600, 300, 200, 100, 6 AND 3 RPM ARE AVAILABLE VIA SYNCHRONOUS MOTOR DRIVING THROUGH PRECISION GEARING. ANY TEST SPEED CAN BE SELECTED WITHOUT STOPPING ROTATION. THE SHEAR STRESS IS DISPLAYED CONTINUOUSLY ON THE CALIBRATED SCALE, SO THAT TIME-DEPENDENT VISCOSITY CHARACTERISTICS CAN BE OBSERVED AS A FUNCTION OF TIME. THE MODEL 35A VISCOMETER IS POWERED BY A 60-HZ MOTOR.