ELTRA EL721A500S5P10X Blind hollow shaft Incremental encoder with fixing holes (diam. 63,5 mm). Without zero pulse. Encoder diameter: 72 mm. 500 ppr resolution. 5 V DC Power Supply. Electronic interface: Push Pull. 10 mm shaft diameter. Protection class: IP 54. Series specially designed for direct mounting on tachometric dynamos or motors thanks to integrated elastic coupling which allow radial and / or axial motor shaft play.