The GRAYHILL part 61K128 is an optical encoder designed for rotary incremental applications. With a compact and flat profile, this encoder offers convenience and ease of installation. It features a straight digital square wave output and is equipped with through-hole PC pins for secure and reliable connection. With a resolution of 128 counts per revolution (CPR), this encoder provides accurate and precise position sensing. Its lightweight design, weighing only 1.5oz.in, allows for seamless integration into various industrial and commercial applications.