Profile: Eltrol specializes in offering amplifiers and precision motion controls. We also provide high-performance servo amplifiers for industrial automation equipment and robotic systems. We offer PWM amplifiers, which are suitable for a wide range of applications with greatly reduced power dissipation. It provides closed loop four quadrant PWM control of velocity or force or torque of linear or rotary motors. The amplifiers accept velocity feedback via tachometer, encoder or Hall sensors.