Through Bore Encoder


The REV Through Bore Encoder is specifically designed with the end user in mind, allowing teams to place sensors in the locations closest to the rotation that they wish to measure. This rotary sensor measures both relative and absolute position through its ABI quadrature output and its absolute position pulse output. Mounting an encoder has never been easier with a 1/2in Hex Through Bore paired with the molded mounting holes which allow users to quickly place this encoder on the object they want to measure. Using one of the included inserts allows for the 1/2in hex to convert to 3/8in hex, 5mm hex, or 1/4in round for additional flexibility.


  • Incremental and absolute magnetic encodera
    • Built-in magnet
    • Quadrature output - A, B, and Index
    • Absolute output - Pulse Width (Duty Cycle)
    • Broadcom AEAT-8800
  • Factory calibrated zero-positionb
    • Zero calibrated to notch in case
  • Through-bore design
    • Easily mounted to any shaft
    • Bore inserts
      • 1/2in Hex (default)
      • 3/8in Hex
      • 5mm Hex
      • 1/4in Round
  • Mounting holes
    • Holes spacing matches common FRC gearboxes and chassis

a. The FTC Control System only supports Incremental Encoder input through the motor encoder ports at this time. Absolute pulse input is not supported.
b. Do not disassemble the sensor. Disassembling the Through Bore Encoder will dereference the zero position with the physical case notch. It is not possible to recalibrate the zero position as it is permanently saved inside the sensor at the factory.


  • Input Voltage: 3.3V - 5.0V
  • Logic Level: 3.3V (5V tolerant)
  • Incremental Output:
    • Quadrature Resolution: 2048 Cycles per Revolution (8192 Counts per Revolution)
    • Index Pulse Width: 90°e
    • Index Pulse Frequency: Once per Revolution
  • Absolute Pulse Output (Duty Cycle):
    • Output Period: 1025μs
    • Output Frequency: 975.6Hz
    • Minimum Pulse (0°): 1μs
    • Maximum Pulse (360°): 1024μs
    • Pulse Resolution: 10-bit
  • Connector: JST-PH 6-pin
  • Mounting Holes: #10 Clearance
  • Maximum Rotation Speed: 10000 RPM
  • Weight(s): 
    • 1/2in Hex (default): 23.0g (0.05lbs)
    • 3/8in Hex: 23.5g (0.051lbs)
    • 5mm Hex: 24.0g (0.052lbs)
    • 1/4in Round: 24.0g (0.052lbs)

Kit Contents


CAD & Drawings