Abstract: A torque measuring device for determining properties such as viscosity, shearing force or concentration in liquids or suspensions. The device comprises two elastically connected concentric axles in the form of one external hollow axle through which an inner measuring axle extends, and an element responsive to the measured medium located on a distal end of the measuring axle. The axles are individually propelled by electrical motors. The motors are operated such that the axles rotate at generally constant speed and, simultaneously, the phase between the two are controlled irrespective of applied speed and torque. The torque is measured through the degree of load of the motor propelling the inner axle, which is provided as an output signal.

Abstract: The present invention relates to a device for a torque meter for determining of for example viscosity, shearing force or concentration of liquids or suspensions, and comprising two elastically connected concentric axles, one external hollow axle (6) through which an inner meter axle (5) extends, on which latter an element (4) responsive to the measurement medium (3) is located. According to the invention the axles (6, 5) are propelled by an electrical motor (9, 10), said motors are at least on average continuously propelled at equal rotational speed at the same time the phase between the two is being controlled irrespective of the applied speed and torque, wherein the torque is possible to measure through the degree of load at the motor (10) propelling the inner axle (5), which is transformable to a suitable out signal.