PAS/Torque Sensors

Torque and basic PAS sensors are used in conjunction with a V3 Cycle Analyst in order to provide automatic pedal assistance while riding the bike. For a full explanation of why you might want a PAS sensor and and how to choose what is best for you, see our Pedal Assist System info page.

The TDCM bottom bracket has 12 pole cadence sensor as well as a 2.5-3.3V voltage output that is proportional to the chain tension on the crank, and works great when you are after a responsive pedalec mode without concern of the exact human watts. 

The installation guide for the TDCM is available here.

The THUN sensor has an 8-pole cadence sensor and measures the actual torque across the spindle. It gives the most accurate human power statistics but it only senses the left pedal force, so there can be some delay in pedalec assistance if you start from a standstill pushing on the right crank.

The installation guide for the THUN sensor is available here.

The Sempu sensors have a 24-pole cadence sensor and measure general force on both left and right cranks. They work excellent for applications of proportional pedal assist and have an almost immediate start. SEMPU installation guide.

These options are available in a range of spindle lengths and have a JIS square taper for the cranks. It is usually no problem if the spindle is a few mm longer or shorter than the one being replaced. The bottom bracket sensors all require drilling a cable hole through the BB shell on the bike for installation.

 

16 Item(s)

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  • ISIS_128

    ISIS_128

    US$240.00

    Out Of Stock

    NCTE ISIS Splined Torque Sensing Bottom Bracket 128mm Spindle Length
  • PAS_12P

    PAS_12P

    US$24.00
    CA3 Compatible Quadrature PAS Sensor, Split 12 Magnet Ring for Square Taper Spindle Mount
  • PAS_12P_Chr

    PAS_12P_Chr

    US$24.00
    CA3 Compatible Quadrature PAS Sensor, with Split 12 Magnet Ring for Chainring Mount. Must have Steel Chainring bolts. For 74mm 5 Bbolt and 64mm 4 Bolt Cranksets.
  • 24 Pole Mini Sensor Wired for V3 Cycle Analyst

    PAS_24P

    US$24.00
    New CA3 Compatible Mini PAS Sensor with 24 Poles for Immediate Engagement. For Square Taper Spindles.
  • Sempu 115mm Torque Sensing Bottom Bracket and Cables for CA3

    Sempu_115

    US$115.00
    Sempu Torque Sensing Bottom Bracket, 115mm Spindle
  • Sempu 122mm Torque Sensing Bottom Bracket and Cables for CA3

    Sempu_122

    US$115.00
    Sempu Torque Sensing Bottom Bracket, 122.5mm Spindle
  • Sempu 128mm Torque Sensing Bottom Bracket and Cables for CA3

    Sempu_128

    US$115.00
    Sempu Torque Sensing Bottom Bracket, 127.5mm Spindle
  • Sempu 140mm Torque Sensing Bottom Bracket and Cables for CA3

    Sempu_140

    US$125.00
    Sempu Torque Sensing Bottom Bracket for Fatbikes with 84mm wide BB's.
  • StrainAmp

    StrainAmp

    US$40.00
    Strain Gauge Amplifier Board and PAS Connection from RSD Stokemonkey System. Available for DIY Strain Sensor Projects
  • TDCM_114

    TDCM_114

    US$145.00
    TDCM Torque Sensing Bottom Bracket, CA3 Compatible. 114mm Spindle
  • TDCM_120

    TDCM_120

    US$145.00
    TDCM Torque Sensing Bottom Bracket, CA3 Compatible. 120mm Spindle
  • TDCM_128

    TDCM_128

    US$145.00
    TDCM Torque Sensing Bottom Bracket, CA3 Compatible. 128mm Spindle
  • THUN_120K

    THUN_120K

    US$240.00

    Out Of Stock

    Thun X-CELL RT Torque Sensor, 120K/116mm Spindle, incl. Cable and Connector for CA3
    (Jan 2017: ETA still unknown, not in Grin's control)
  • THUN_120L

    THUN_120L

    US$240.00

    Out Of Stock

    Thun X-CELL RT Torque Sensor, 120L/119mm Spindle, incl. Cable and Connector for CA3
    (Jan 2017: ETA still unknown, not in Grin's control)
  • THUN_128L

    THUN_128L

    US$240.00

    Out Of Stock

    Thun X-CELL RT Torque Sensor, 128mm Spindle, incl. Cable and Connector for CA3
    (Jan 2017: ETA still unknown, not in Grin's control)
  • THUN_136L

    THUN_136L

    US$240.00

    Out Of Stock

    Thun X-CELL RT Torque Sensor, 136 mm Spindle, incl. Cable and Connector for CA3
    (Jan 2017: ETA still unknown, not in Grin's control)

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