Torsiometers

Unleash the power of precision with our state-of-the-art Torsiometers designed to enhance your biomechanical studies. Whether you're investigating forearm pronation/supination or neck axial rotation, our Torsiometers offer single-axis measurements that remain consistent even when bent in different planes.

Wireless / Wired

Our Torsiometers are designed to adapt to various joint sizes, ensuring optimal placement for accurate measurements. They can be used across different population groups, from adults to pediatrics, providing flexibility and versatility in your studies or practice. And with a life expectancy of 600,000 cycles, you can rely on their longevity, maximizing your return on investment.

Choose from wireless or wired options according to your needs. The wireless Torsiometers come equipped with a wireless transmitter that offers you total freedom of movement within a 30m range, freeing you from the constraints of wired connections and enabling more natural, real-world study conditions.

Specifications

Wireless Torsiometer Wired Torsiometer
Number of Axis 1
Resolution + 0.1º in a range of 180º
Bandwidth From DC to 1 KHz (+0dB/-3dB)
Full Scale ±180º
Accuracy ± 2º measured over a range of ± 90º
Repeatability 1º measured over a range of 90º
Transducer Type Strain gauge
Life1 600,000 cycles
Operating temperature range +10ºC to +40ºC
Temperature zero drift 0.15 degrees angle / ºC
Battery Life Up to 12 hours N/A
Battery Type Rechargeable Li-lon Polymer N/A
Wireless Transmission Data Loss Tolerant for 100 mS N/A
Range from Interface Wireless range up to 30m Cable lengths available: 500mm, 1000mm, 1500mm
(custom lengths available on request)
Available Sizes Click to view

Wireless Torsiometer

In general, there are no fixed rules governing which size of sensor is most suitable for a particular joint; this depends on the size of the subject. The sensor must be capable of reaching across the joint so that the two end blocks can be mounted where least movement occurs between the skin and underlying skeletal structure. In certain circumstances more than one size of sensor will be appropriate. The following table is given for guidance only and refers to an adult population. Size used will vary within paediatrics.

Wireless Single-Axis Torsiometer Diagram
  Joint Output No. of Channels A Max A Min B C D E Weight (g) Minimum permissible bend rad. (mm)
Z110 Neck Axial rotation 1 110 70 60 18 52 20 25 40
Z180 Forearm Pronation/supination 1 180 130 70 18 52 20 26 40
Z180 Back Axial rotation 1 180 130 70 18 52 20 26 40

(measurements in mm)

 Click to view

Wired Torsiometer

In general, there are no fixed rules governing which size of sensor is most suitable for a particular joint; this depends on the size of the subject. The sensor must be capable of reaching across the joint so that the two end blocks can be mounted where least movement occurs between the skin and underlying skeletal structure. In certain circumstances more than one size of sensor will be appropriate. The following table is given for guidance only and refers to an adult population. Size used will vary within pediatrics.

Wired Single-Axis Torsiometer Diagram
  Joint Output No. of Channels A Max A Min B C D E Weight (g) Minimum permissible bend rad. (mm)
Q110 Neck Axial rotation 1 110 70 60 18 54 20 22 40
Q150 Forearm Pronation/supination 1 170 115 70 18 54 20 23 40
Q150 Back Axial rotation 1 170 115 70 18 54 20 23 40

(measurements in mm)
Compatible Interfaces DataLITE PIONEER, ADVANCE, EXPLORE DataLOG, DataLINK, Amplifier or 3rd party

1Life test results have been collected by cycling the sensors through movements that would happen during everyday use. For example, placing a sensor on an adult elbow and moving from the neutral position to maximum flexion and back to the neutral position, the unit will function for typically 600,000 cycles.

Harness the potential of our Torsiometers in a multitude of applications, including:

  • Biomechanics: Enhance your understanding of body movements and improve your designs or interventions.
  • Ergonomics: Optimize work environments for comfort and efficiency, minimizing the risk of strain or injury.
  • Clinical & Medical Settings: Improve patient assessments and treatment strategies with accurate movement data.
  • Sports Science: Refine athletes' techniques and postures to maximize performance and prevent injuries.
  • Gait Analysis: Gain detailed insights into walking patterns to help improve mobility and rehabilitation outcomes.
  • And Many More: Torsiometers find wide-ranging applications anywhere that requires understanding and quantifying joint movement, including research labs, industries designing ergonomic products, animation studios for motion capture, and more.

Frequently Asked Questions

A Torsiometer is a device designed to measure rotations in one plane, such as forearm pronation/supination or neck axial rotation.

Both types of Torsiometers function the same way. The main difference is that the wireless Torsiometer contains a transmitter that allows for a range of movement up to 30m from its interface, offering greater freedom of movement.

Torsiometers are widely used in various fields, including Biomechanics, Ergonomics, Gait Analysis, Sports Science, and Clinical & Medical Settings, among others.

The Torsiometer is designed to function typically for 600,000 cycles. This was determined through life test results collected by cycling the sensors through movements that would happen during everyday use.

Yes, our Torsiometers are designed to be lightweight and flexible, so they can be comfortably worn under clothing without hindering movement.

The wireless Torsiometer uses a rechargeable Li-Ion Polymer battery, which can last up to 12 hours.

The Torsiometer has an accuracy of ± 2º measured over a range of ± 90º.

We provide thorough customer service and a two-year warranty for our products.

Torsiometer Citations

Here are a few of our favourite studies using Biometrics Ltd Torsiometer sensors

Stable, three degree-of-freedom myoelectric prosthetic control via chronic bipolar intramuscular electrodes

Dewald, H.A., Lukyanenko, P., Lambrecht, J.M. et al.

J NeuroEngineering Rehabil 16, 147 (2019)

Long-term tremor therapy for Parkinson and essential tremor with sensor-guided botulinum toxin type A injections

Samotus O, Lee J, Jog M.

PLoS One. 2017;12(6):e0178670. Published 2017 Jun 6.

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