ELTRA RL500C1000S528N10X3JA Metric wheels. Size: 500 mm linear extent. Wheel type: rubberized. Resolution: 1000 ppr. Without zero pulse. Power supply: 5 - 28 V DC. Output type: NPN Shaft diameter: 10 mm. Encosure rating: IP 54. Rotation speed: 3000 rpm max. Radial J connector output. Wheels are perfect for industrial applications for measurement of linear movement.