Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Electric Method and Device for Assessing Viscosity of Polymeric and Other Hardening Materials V.I. ZUBTSOV, L.M. PARFENOVA The article proposes a method and device for estimating the viscosity of hardening materials according to the obtained dependence of the moment of rotation of the motor shaft on the amount of power consumed by it from the mains using the nameplate characteristics of this motor. The results of measurements of the torques obtained on melts of various polymers are presented. Shows how to calibrate the device in viscosity units. Keywords: Viscosity, viscometer, mixer, melt, solution, electric motor power, torque, calibration. DOI: 10.25791/pribor.8.2022.1353 Pp. 15-18.