Torsiometers

Biometrics Ltd, UK

Biometrics Ltd ‘Q’ series single axis torsiometers are designed for measurement of rotations in one plane e.g. forearm pronation/supination or neck axial rotation. If the torsiometer is bent in planes X-X or Y-Y the output remains constant. All torsiometers function in the same way, the difference being physical size.

 

Specifications

Joint Output No. of Channels A Max (mm)
A Min (mm)
B (mm)
C (mm)
D (mm)
E (mm)
Q110 Neck Axial rotation 1 110 70 60 18 54 20
Q150 Forearm Pronation/supination 1 170 115 70 18 54 20

 

Transducer Type strain gauge
Life1 600,000 cycles
Accuracy
± 2º measured over a range of ± 90º
Repeatability 1º measured over a range of 90º
Operating Temperature Range +10ºC to +40ºC
Temperature Zero Drift 0.15 degrees angle / ºC

 

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.