A rotary encoder, also called a shaft encoder, is an electro-mechanical device that converts the angular position or motion of a shaft or axle to an analog or digital output signals. There are two main types of rotary encoder: absolute and incremental. Features: The E6H family of incremental encoders features a dia 40mm hollow shaft. Wide operating voltage range from 5 to 24 VDC Line drive output available (100 m max.) Specifications: Brand: Omron MPN: E6H-CWZ6C