Wire encoder potentiometer includes a spring return device with high flexible steel cable inside and a sensor(encoder or potentiometer). The optical rotary encoder or the potentiometer can calculate and measure the rotational turns of cable drum and outputs the proportional signals which represent the length and distance. ROUNDSS as China the 2nd largest encoder manufacturer, supplies a complete series of wire encoder potentiometer products from 500mm to 3000mm stroke. Different types of wire encoder potentiometers offer you the best solution for your application.