CLSx – Steering Effort Sensor

Steering effort sensor for cars and trucks

High-precision steering effort sensor: The CLS

With the innovative CLSx steering effort sensor, the original steering wheel of your vehicle becomes a high-precision instrument that measures steering torque, angle, steering velocity and acceleration in x, y and z directions. Whether passenger car, truck or construction machinery, the ultra-slim sensor can be placed between the steering column and steering wheel in just a few simple steps. The functionality of the original steering wheel including airbag is completely preserved.

Important features at a glance:

  • Detects torque, angle and rotational velocity
  • Acceleration measurement in X, Y & Z directions
  • World’s smallest and lightest sensor
  • Optimized for autonomous driving tests
  • Quick and easy installation on almost all vehicles

Ideal for the following standards:

  • ISO 4138 Steady-state circular driving
  • ISO 7975 Braking in a turn
  • ISO 7401 Lateral transient response test
  • ISO 3888 Severe lane-change maneuver
  • ISO 7401 Sinus weave test
  • ISO 17288 Free-steer behavior
  • ECE-R 79 Steering equipment
  • NHTSA Fishhook test (tipping stability)

Data Sheet

Data Sheet for steering effort sensor CLSx

Technical Data – CLSx

Steering torque

Parameter Value Remarks
Measuring principle temperature compensated strain gauge application  
Measurement range ±100 Nm others upon request
Accuracy 0.1% FS Combined (gain error and non-linearity)
Bandwidth 0 to 800 Hz sampling rate 5 kHz

Steering Angle

Parameter Value Remarks
Measuring principle incremental angle encoder  
Measurement range ±1440 °  
Accuracy 0.045 °  
Bandwidth 0 to 800 Hz sampling rate 5 kHz

Steering velocity (angular velocity)

Parameter Value Remarks
Measuring principle calculated from angle  
Measurement range ±2048 °/s  
Bandwidth 0 to 800 Hz sampling rate 5 kHz

Vibration and acceleration

Parameter Value Remarks
Vibration in the center of the steering column, measurement range up to 5 g in x, y and z direction  
Rotational acceleration measurement range ±10000 °/s2  

General data

Parameter Value Remarks
Sensor height appox. 30 mm without adapter
Sensor weight approx. 0.6 kg without adapter
Overload >100% of the measurement range  
Mech. breaking torque >500 Nm  
Adaption special adaption sets for any car or truck manufacturer available  
Moment of inertia Sensor approx. 3000 g cm2  
Steering wheel or column adapter typ. approx. 500 g cm2  
Working temperature -20°C to +80°C  

Control unit

Parameter Value Remarks
Supply 9 to 36 V DC  
CAN output freely configurable  
Analog Output freely configurable, max. ±10 V  
Auto zero with push-button for torque and angle at
the panel or by remote control