Description Following the principles of magnetic hysteresis (the property of systems that do not instantly respond to the forces applied to them, but react slowly), Magtrol makes products that let drivers stay in control. Magtrol designs and manufactures devices for the testing, measurement, and control of torque, speed, power, load, force, weight, tension, and displacement. The company is a leading maker of motor test equipment and hysteresis brakes and clutches. Switzerland-based subsidiary Magtrol SA offers motor test equipment and products to measure, control, and monitor load-force-weight and displacement. Magtrol also has sales offices in China, France, Germany, India, and the UK.