Automation systems offers hollow shaft incremental encoders from metronix, korea, available in series h35, h40, h45 and h60 for ac/dc servo motor applications. The bore size available is 6, 8 and 12.7 mm, and the resolution varies from 10 ppr up to 6000 ppr. O/p option available is line driver, open collector, voltage, totem pole 5v dc and 5-24v dc, available in 6 channels and 12 channels. These hollow shaft encoders include features like high resolution, high speed responsibility and easy to attach. Hollow shaft encoders are suitable to replace in-built encoders in the various motors without any modifications. The prices of these encoders are very competitive than indigenous encoders and other international brands available in india.