- 360 PPR Optical Incremental Rotary Encoder - 10mm Diameter Semi-hollow Shaft and Synchro Flange MountPart No: DRO-AT-O58-B10-360-T33AZ£125.18A 360 Pulses Per Revolution (PPR) incremental rotary encoder, optical sensing type. With 10mm diameter semi-hollow shaft. The encoder can be mounted by the M4 threaded holes in the front face. 58mm diameter housing with rear cable exit. Industrial standard quadrature TTL output. Also known as a shaft encoder. Learn More