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What are the different types of torque sensors?

Sensors have been increasingly used in precision engineering due to the rise of machinery automation, so understanding the principle of torque measurement is crucial. Torque sensors, also known as torque transducers, are pivotal in various mechanical systems, ensuring their efficiency and reliability.

Torque sensors measure the torque (rotational force) applied to an object, which is essential for monitoring, controlling, and optimizing the performance of machinery. They convert the nominal value of mechanical torque into measurable electrical signals, providing accurate data for engineering analysis. Nowadays, different torque sensors are available, and their design has become more sophisticated to cater to a wide range of industrial applications.

Rotary Torque Sensors

Rotary torque sensors measure the torque on rotating parts such as motors, crankshafts, and gearboxes. They are widely used in automotive testing, manufacturing machinery, and powertrain applications. Rotary torque transducers offer high accuracy and can measure static and dynamic torque. Two types of rotating torque sensors are available, listed below.

Contact / Slip-Ring Rotary Torque Sensors: These sensors use slip rings to transfer the electrical signal from the rotating shaft. Although they are reliable, the physical contact between components can lead to wear and tear over time.

Non-contact Rotary Torque Sensors: Utilizing magnetic or optical techniques to transmit electrical signals without contact, these sensors offer longevity and have less need for maintenance. They are ideal for high-speed measurement applications and for cases requiring minimal external interference.

Static / Reaction Torque Sensors

Static torque sensors measure reaction torque without requiring the shaft to rotate. They are suitable for applications where the torque of stationary objects needs to be measured, such as in screw driving or when monitoring torque in a static system. The sensors can be connected through flange-to-flange or keyed-in shaft connection. Static torque sensors are critical in manufacturing applications, where precise torque control is essential for ensuring product quality.

Browse our offering of static torque sensors HERE.

Force-Torque Sensor / 6-Axis Torque Sensors

A 6-axis or multi-component torque sensor measures force and torque in three perpendicular axes, which allows for simultaneous monitoring and control of the forces and moment applied to the sensor. This sensor is particularly suitable for complex applications requiring delicate handling and precise motion control, such as robotics or advanced automation.

Digital Torque Sensors

The digital torque sensors are designed as handheld devices or mounted on the test stand to provide torque measurement in digital format. They can be used in conjunction with the windows-based measurement software for data analysis and results presentation in a spreadsheet.

Torque Sensors are typically used for the following industrial measurement applications, including but not limited to:

  • Automotive Testing
  • Motorized Test Stand
  • Tool Testing
  • Wheel-torque measurement

Choosing a suitable type of torque sensor for your applications depends on various factors, including the nature of the application, the required speed and accuracy as well as environmental conditions. Understanding the different types of torque sensors and their applications is essential for engineers and technicians to select the most appropriate sensor for their specific needs. Our engineers can provide you with technical information and assist in selecting the sensor for your measurement applications.