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 analog or digital output signals. There are two main types of rotary encoder: absolute and incremental. Specification: is customized: Yes Brand Name: OMRON Model Number: encoder E6A2-CW5C Package includes: 1 x OMRON E6A2-CW5C Rotary Encoder