The rotary encoder and absolute encoder also called a shaft encoder and hollow type encoder it is the electro-mechanical device that converts the angular position or motion of a shaft or axle to an analog or digital output signal. Encoder maintains the PPR which is pulse per regulation is 2500 ppr, 1000 ppr, 5000 ppr, which is calculation Max encoder resolution = Operating Frequency x 60 / Max RPM also two main types of a rotary encoder which are absolute and incremental type. BD Engineering can help customized products which are position control and measuring your controlling equipment. Also, provide very special prices for the Bangladeshi industrial manufacturing factory and support by a very experienced engineering team.