...0 1 2 3 4 5 6 7 8 9 Those with the initials E for Rotary Encoders is a product of less than 12. E63-WF E69-[] E6A2-C E6B2-C E6C2-C E6C3-A E6C3-C E6CP-A E6D-C E6F-A E6F-C E6H-C...https://www.ia.omron.com/products/index/sensors/rotary-encoders/E.html