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Wheel Torque Transducer WTT-Dx

Acquire drive and output torques directly at the wheel

In automotive development, it is important to know the exact torques acting on the vehicle – especially under acceleration and braking maneuvers. With the WTT-Dx wheel torque transducer, a high-precision tool is available for making such measurements. The WTT detects the mechanical load directly where it is produced: the wheels that form the interface between the vehicle and the road.


  • csm_WTT-Front_web_30e6cdbf2e

    At a glance:

    Precise measuring of drive and braking torque directly at the wheel
    Cable-free data transmission via Dx telemetry to Dx receiver unit in the vehicle
    Synchronous data acquisition from up to four WTTs with a single receiver unit
    Replaceable battery with up to 80 h running time
    Operating temperature -10 °C to +60 °C, with optional special battery -30 °C to +60 °C
    Waterproof according to IP67 protection rating
    Comfortable software-controlled zero calibration and measurement start
    Analog and CAN interface


  • WTT-Dx_Grafik-Adaptersystem

    1. Hub adapter:
      The hub adapter connects the WTT-Dx to the vehicle. It can be used for different types of vehicles, as long as the bolt circle and the wheel offset are the same. With just a few hub adapters, an entire vehicle fleet can be covered.
    2. Rim adapter:
      As with a conventional rim, the rim adapter serves as a mount for the tire. The rim adapter is not directly specific to the vehicle, but depends on the tire. This allows it to be used on different vehicles with the same tire size.
    3. WFT sensor housing:
      The WFT sensor housing connects the hub adapter and the rim adapter to each other. These three components together form the vehicle-specific wheel. Since the calibration factors are permanently stored in the sensor, you can recombine adapters and sensor housings at any time without having to calibrate the wheel again. Thus, based on a modular design, a WTT-Dx Wheel Force Transducer can be adapted to the vehicle in a time-saving, space-saving and cost-effective manner.
  • Technical data: WTT-DX wheel torque transducer

    Parameter Value
    Measurement value torque in axial direction My
    Signal transmission digital-telemetric
    Measurement range My = 8,75 ±6000 Nm, optional, My = ±3000 Nm
    Bandwidth max. 1 kHz
    Linearity < 0.5 %
    Hysteresis < 0.5 %
    Crosstalk < 0.5 %
    Sensor diameter 300 mm
    Sensor weight ca. 4.75 kg (incl. telemetry unit)
    ca. 6.3 kg (with battery)
    Sensor housing material aluminum
    Mechanical load stress analysis according to AK-LH-08 4.34
    Rim diameter min. 13″
    Hub diameter with adapter max. 6″
    Operating temperature -10° C up to +60° C (standard battery)
    -30° C up to +60° C (special battery)
    Max. driving speed 250 km/h
    Max. rpm 2300 rpm
    Shock proof 100 g
    Protection rating IP67 (waterproof)
    Mounting and balancing yes (wheel bolts accessible)
    Power supply standard battery: up to 80 h
    special battery: up to 40 h


    Telemetry receiver RCI

    Telemetry properties Value
    Power supply 9 to 36 V DC
    Power consumption < 0.5 W
    Frequency freely-configurable in the 868 MHz band (optional 2.4 GHz)
    Synchronization synchronized sampling of up to 4 WTTs
    CAN output (connection according to ISO 11898,
    galvanically isolated)
    CAN 2.0b, standard & extended-identifier,
    freely-programmable up to max. 1 MBaud
    Analog output 6 x BNC sockets, (freely-assignable, output signal max. ±10 V)
    Ethernet 10/100 Mbit
    Auto-zero remote-controllable
    Temperature range -20 °C up to +65 °C
    Dimensions ca. 170 mm x 130 mm x 53 mm
    Weight 0.8 kg