Wheel torque transducers
Drive and brake torque at the wheel, while the vehicle is driven.
The transducer takes the place of the wheel center, between a hub adapter and a rim adapter, and measures the torque about the axle, My, in both directions: drive torque and brake torque on one channel. Used for driveline efficiency, brake drag torque, rolling resistance and consumption tests.
- 237 N·m to 81 kN·m
- torque capacity, TW series
- ≤ 0.1 % FS
- non-linearity, passenger car and light truck models
- 0.14 N·m
- resolution, TW12.8HRMS175
- 24 to 121 °C
- temperature-compensated range, TW10.8, TW12.8, TW15.0, TW-2T-12.5K
One component, measured where it acts.
A TW transducer measures the torque about the axle, My, between the hub and the rim. The torque rating and the combined steer and camber moment rating are the same, model by model.
Advantages
- ReplaceThe transducer mounts between a hub adapter and a rim adapter that reproduce the critical dimensions of the original rim and keep the tire on the production centerline.
- MeasureA four-arm strain gage bridge gives the drive and brake torque in both directions, temperature compensated between 24 and 121 °C.
- TransmitThe signal leaves the wheel through a weatherproof slip ring package, with encoder and amplifier, or by telemetry.
- RecordThe bridge gives 1.5 mV/V nominal at full scale, at up to 10 V DC excitation. Its signal goes to your data acquisition system directly or through the amplifier of the slip ring package.
Wheel torque transducer selection
Vehicle class, torque capacity, resolution. Models meeting every criterion, ranked by margin.
Set the criteria. Closest models first.
| Model | Vehicle | Torque capacity (N·m) | High resolution | Actions |
|---|---|---|---|---|
| TW12.8HRMS175 | Passenger cars · Light trucks | 237 | Yes | Request a quote Configure Datasheet |
| TW12.8HRMS800 | Passenger cars · Light trucks | 1 085 | Yes | Request a quote Configure Datasheet |
| TWHR2000 | Highway trucks | 2 700 | Yes | Request a quote Configure Datasheet |
| TW10.8 | Passenger cars | 4 068 | — | Request a quote Configure Datasheet |
| TW9.5 | ATVs · Lightweight vehicles | 5 400 | — | Request a quote Configure Datasheet |
| TW12.8ER | Passenger cars · Light trucks | 5 400 | — | Request a quote Configure Datasheet |
| TW12.8 | Passenger cars · Light trucks | 8 100 | — | Request a quote Configure Datasheet |
| TW15.0 | Light trucks · Medium-duty trucks | 9 492 | — | Request a quote Configure Datasheet |
| TW-2T-12.5K | Pick-up trucks · Vans · SUVs · Light trucks · Medium-duty trucks | 16 948 | — | Request a quote Configure Datasheet |
| TW-2T-50K | Class 8 trucks · Agricultural equipment · Construction equipment | 67 000 | — | Request a quote Configure Datasheet |
| TW-2T-60K-S | Class 8 trucks · Agricultural equipment · Construction equipment | 81 000 | — | Request a quote Configure Datasheet |
No catalogue model meets every criterion. Custom versions exist: ask us.
Rim size and bolt pattern available? Send them, an application engineer selects the transducer and the adapters. Send the data
Applications
-
Durability Wheel loads on the road Three forces and three moments at each wheel, recorded while the vehicle is driven. -
Efficiency Vehicle efficiency and power mapping Torque and speed measured at each driveline stage, from engine to wheel, so each power loss has a location. -
Efficiency Brake drag and rolling resistance Low drag torques at the wheel, read on the road with a resolution of 0.14 N·m on cars and SUVs. -
Powertrain Truck solid axle torque Drive torque on a truck solid axle, read by strain gages inside the shaft and brought out at the wheel.
Services around the product
Support, calibration and custom parts, from the same team.
-
Service Technical support An application engineer answers, and a loan unit covers an urgent breakdown. See the service -
Service Calibration Accredited ISO/IEC 17025 calibration, 1 to 6 axes, for Michigan Scientific transducers and those of other manufacturers. See the service -
Service Custom transducers Your own part strain gaged and calibrated, or a transducer designed for your space and load case. See the service -
Service Rental Transducers and instrumentation rented for a test campaign, calibrated before shipping. See the service
Technical data and documents
- Detail page
TW series
Specifications per model, rim sizes, high-resolution versions, users manual, configurator.
Open the TW series - Product family
Wheel force transducers
When you need all six load components at the wheel center: the LW series, 15.5 to 700 kN.
See the wheel force transducers - Service
Rental
A calibrated set for one campaign, with its adapters.
Rental conditions
What engineers ask first
Torque transducer or force transducer?
Choose a TW when you only need drive and brake torque: driveline efficiency, drag torque, rolling resistance. Choose an LW wheel force transducer, a separate family, when you need the loads the road puts into the vehicle: durability, vehicle dynamics, road load data for a rig.
When do I need a high-resolution version?
When the torques to read are low: friction, grip or consumption work. The TW12.8HRMS175 resolves 0.14 N·m over 237 N·m, the TW12.8HRMS800 0.27 N·m over 1 085 N·m. The high-resolution TW models are used for the CO2 and fuel consumption tests of regulation (EU) 2017/2400.
Does it fit my wheel?
The transducer mounts between a rim adapter and a hub adapter designed from the profile of your original rim. Minimum rim size depends on the model, from 10 in for a TW9.5.
Slip ring or telemetry?
Both carry the same signal. A slip ring is wired, with an encoder option; telemetry leaves no cable through the hub.
Does it hold up to hard braking and bad weather?
Yes. The TW transducers are weatherproof sealed and temperature compensated; the TW10.8, TW12.8, TW12.8ER, TW15.0 and TW-2T-12.5K are compensated from 24 to 121 °C.
Technical support
An application engineer answers within 24 hours on working days. When equipment fails during a campaign, diagnosis is remote and a loan unit can be shipped, depending on the project.
How support works- < 24 h
- first answer from an application engineer
- Over 30
- wheel force transducers in the loan and rental fleet
- 1 to 2 weeks
- typical calibration turnaround
Which model for your vehicle?
Send the vehicle, the wheel size and the torque to measure. You get a configured offer, to buy or to rent.
More details to give? Use the full contact form.