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Contactless Torque Transducers

These contactless Torque Transducers are not limited by operational speeds, can fit any shaft and capable of measuring torque from 1nm and up to 500knm, providing highly accurate and reliable torque measurement in many applications.

Contactless Torque Sensor Measurement

The Datum Electronics Series RS425 contactless torque transducer has been designed to fit easily in line with any drive-train or test rig, using either a spline or key-way shaft. This type of torque sensor has many advantages over other torque measurement systems, including zero bearing friction, high speed and high torque applications.

Key Features

Key Features

Contactless Torque Transducer with a completely separate rotor and stator

The Series 425 Contactless Torque Transducers can be adapted to replace existing drive shafts on test rigs and in drive lines, saving the time and cost of designing in special couplings and intermediate shafts to accommodate conventional torque transducers. We are able to modify the ends of the transducer to best suit your requirements, and can even design bespoke ends to fit. By measuring torque on longer drive shaft, you prove the accuracy of the measurement and its tolerance to offset loads. Using a direct replacement with a lightweight rotor the dynamics of the driveline are maintained.

RS425 Rotary Torque Transducer

The RS425 rotary bearingless torque transducer utilises a strain gauged shaft for accurate and reliable torque measurement and a set of rotating on shaft conditioning electronics, where the digital signals are transmitted to the non-rotating part of the system or stator providing a reliable and highly accurate torque measurement solution. The rotor is continuously powered, enabling static and rotary torque measurement to be made. Not only does the RS425 Series offer great technical advantages, but this range of contactless torque sensors are also competitively priced.

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  • Lightweight Torque transducer
  • Completely separate rotor and stator set
  • Long-term operation reduced maintenance
  • Ideal keyway shaft for easy fitting
  • Spline shafts are available as an alternative
  • Ideal for high-speed applications
  • Standard range available from 0Nm-10,000Nm
  • Analogue Output available at 20sps
  • Ideal for fully sealed or underwater applications (IP 67)





      • What is the measurement range of the Datum Electronics RS425 Contactless Torque Sensor?
        The RS425 from Datum can measure torque from 1nm to 500,000nm giving highly accurate and reliable measurements
      • How is the Datum RS425 Contactless Torque Transducer installed?
        The Datum RS425 Torque Sensor is designed to fit in-line with any drive train or test rig, using a spline or a key-way shaft.  It offers zero bearing friction and is suitable for both high speed and high torque installation.
      • How can I work out the Torque for my test, I only have the Motor Speed and power?
        Datum Electronics Ltd can work with the customer to calculate the expected torque using known measurement principle and suggest an appropriate torque sensor for you like our M425`
      • What if I don’t know my maximum torque measurement load?
        Datum Electronics torque sensors have a safety factor built into them for 150% overload protection. Our technical sales team will be happy to work with you to help you choose the right sensor
      • What is the smallest torque that you can measure?
        Our standard RS425 Size 1-Al is a 0-3Nm transducer which will give an accuracy of better than 0.1% of the full scale allowing for measurement in the Ncm range.

      STEP Drawings

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