I.Summary
　The instrument is designed and made as per standards GB/T**5 “Test Methods for Kinematic Viscosity of Petroleum Products and Calculation of Dynamic Viscosity”, GB/T******3 “Test Methods for Viscosity Number and Limiting Viscosity Number of Polymers in Dilute Solution”and ASTM D**5. It is suitable to determine kinematic viscosity, viscosity number, and limiting viscosity number of oils and polymer in dilute solution. It has been widely used in the field of pharmaceutics, petroleum, chemistry, scientific research and metrology.

II.Main technical specifications and parameters
　1.Viscometer tube: Ubbelohde viscometer (Dilution type); as per GB/T******3;
　2.Measurement accuracy: as per GB/T**5 and GB/T******3;
　3.Temperature controlling accuracy: ±0.1℃;
　4.Timing accuracy: ±0.1 s;
　5.Maximum timing time: **9.9 s;
　6.Power supply: AC **0V±*0%, *0 Hz;
   7.Maximum power: ***0 W;
　8.Ambient temperature: 0℃�*0℃;
　9.Relative humidity: *0�*0% at *0 ℃;
　*0.Barometric pressure: *6 kPa�**3 kPa;
Notification: The instrument is equipped with four pieces of photoelectric viscometers. The inner diameter for each is 0.8mm,1.0mm,1.2mm, and 1.5mm.For viscometers with other sizes, please contact us.