QC-NDJ QC-NDJ Rotary Viscosimeter is used for measuring the viscosity friction and absolute viscosity of liquid. Rotors of No. 1-4 are provided to support in testing different viscosity of liquid at different rotation speeds. It is widely used to determine viscosity of various liquids such as oil, paint, plastic, food, medicine, adhesive, etc. The machine applies to broad fields of petrochemistry, medicine, food, light industry, textile industry, scientific research, etc.