Powerful laboratory stirrer designed with a removable wireless controller. It automatically adjusts speeds within the speed range of 0/30-1300 rpm. The stirrer comes equipped with a rs232 and a USB interface to control and document all parameters. An integrated torque trend display is provided for the measurement of viscosity changes. Safety circuits installed ensure automatic cut-off in anti-stall or overload conditions. Continuous comparison of shaft speed guarantees constant speed even with changes in viscosities.