The GRAYHILL part 62D11-02-040C is an optical encoder with a rotary incremental design. It offers a flat and compact construction, weighing only 3.5oz.in, making it ideal for space-constrained applications. This encoder provides a straight digital square wave output and is designed for easy panel mounting. The cable included with this product has 8 CPR (Counts Per Revolution), allowing for accurate and precise rotation detection.