Viscosity measurement device

A viscosity measurement device comprising:

• a housing having an inlet port and an outlet port and a measurement space positioned between the inlet port and the outlet port, respectively;
• a magnetic body arranged in the measurement space;
• an electromagnet for slidingly moving the magnetic body toward an inlet port side;
• a position measurement part for measuring a position of the magnetic body;
• a flow rate detector for measuring a flow rate of a fluid which flows in the measurement space;
• and
• a controller for calculating a viscosity of the fluid on the basis of a shear strain rate of the fluid which passes through the measurement space at the position of the magnetic body, where the position of the magnetic body in the measurement space varies as strength of a magnetic field generated by the electromagnet changes.

A viscosity measurement device installed in a pipeline through which a fluid flows in a reactor or a facility, comprising:

• a housing, having a measurement space, for being mounted to the pipeline;
• a magnetic body disposed in the measurement space;
• an electromagnet for slidingly moving the magnetic body in a direction opposite to a flow direction of the fluid;
• a position measurement part for measuring a position of the magnetic body;
• a flow rate detector for measuring a flow rate of the fluid passing through the pipeline;
• and
• a controller for generating a magnetic field by supplying a current to the electromagnet to move the magnetic body, measuring a shear strain rate of the fluid on the basis of the flow rate of the fluid and the position of the moved magnetic body and measuring a viscosity of the fluid on the basis of strength of the magnetic field and the shear strain rate.