Alps stec12 encoder with 6mm plastic shaft and optional switch alps stec12e05 this alps stec12 plastic shaft incremental rotary encoder is available in horizontal form these rotary encoders have a small footprint and highly accurate sliding contacts applications include volume control in mini hi fi systems av equipment mixing consoles and various in car devices we also supply the stec11 range and other encoders a set of knobs specifically designed for rotary encoders is also available