There are so many projects that require motor position control that Phidgets decided to make an inexpensive, reliable option. The ENC4109 is exactly that: an affordable optical quadrature encoder that is compatible with the mounting pattern of the majority of the DC and stepper motors sold here. See the Compatible Products tab for a complete list of motors to choose from. How to Install See the User Guide tab for a step-by step installation guide for this encoder. Connection This encoder connects to a quadrature encoder interface. The encoder cable provided with this encoder is compatible with all Phidgets encoder interfaces. See the Compatible Products tab for details. Package Content: 2 Mounting Screws Encoder Wheel, PCB, Base and Cap Encoder Cable Product Specifications Encoder Properties Controlled By Encoder Interface Output Circuit Type Push-Pull Encoder Speed Max 6000 RPM Encoder Resolution 40 CPR Electrical Properties Supply Voltage Min 2.7 V DC Supply Voltage Max 7 V DC Output Frequency Max 12.5 kHz Physical Properties Operating Temperature Min -40 °C Operating Temperature Max 85 °C IP Rating IP65 Product Page