Rheometer

A rheometer having a rotatable shaft (1) on which a rotor plate (2) is fastened, and having a measuring instrument (10) for measuring torques exerted on the rotor plate (2) by a substance (6) to be studied during rotation of the shaft (1), wherein a first measurement gap (5) for holding the substance (6) to be studied is formed between a first side (3) of the rotor plate (2) and a first shear face (4) and a second measurement gap (9) for holding the substance (6) to be studied is formed between a second side (7) of the rotor plate (2), opposite the first side, and a second shear face (8), and wherein the rheometer contains a magnet for generating a magnetic field in the first and second measurement gaps (5, 9).

A method for determining rheological properties of a magnetorheological fluid to be studied, comprising rotation of a rotor plate fastened on a shaft, the rotor plate being in contact on a first side with the magnetorheological fluid to be studied, contained in a first measurement gap, and being in contact on a second side opposite the first side with the magnetorheological fluid to be studied, contained in a second measurement gap, generation of a magnetic field in the first and second measurement gaps and measurement of torques exerted on the rotor plate by the magnetorheological fluid during the rotation of the rotor plate.