Measurement of degree of fiber concentration in pulp inside machine, preferably refiner for manufacture of paper pulp, comprises measuring impedance between rotor surface and sensor surface during axial movement of impedance meter body

摘要

A degree of fiber concentration in pulp inside a machine is measured by measuring impedance between rotor (3) surface and sensor surface (18) during axial movement of impedance meter body, and using measured impedance differences together with size of movement to determine dielectric constant of pulp, from which the degree of fiber concentration of the pulp is derived. The measurement of degree of fiber concentration in pulp inside the machine involves measuring impedance between rotor surface and sensor surface during axial movement of impedance meter body, and using measured impedance differences together with size of movement to determine dielectric constant of pulp, from which the degree of fiber concentration of the pulp is derived. The machine comprises stator (5) and an opposing rotor, which form a grinding gap for the pump, with the stator being provided with sensor device (7), designated to interact with the rotor surface and comprising impedance meter body with sensor surface. An independent claim is also included for a sensor device for measuring the degree of fiber concentration in pulp inside a refiner.