The comprehensive range of Biometrics' electrogoniometers and torsiometers are ideal for quick, simple, and accurate measurement of joint movement in multiple planes. Extremely robust, lightweight and flexible, the sensors can be comfortably worn undetected under clothing, without hindering the actual movement of the joint.
The 'SG' series twin axis goniometers and 'Q' series single axis torsiometers provide improved mechanical integrity and electrical performance.
Goniometer and Torsiometer Specifications
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.
|Joint||Output||No. of Channels||A Max||A Min||B||C||D||E||Weight (g)|
|SG65||Wrist||Flexion/extension, radial/ulnar deviation||2||65||30||55||18||54||20||22|
|SG75||Wrist (large)||Flexion/extension, radial/ulnar deviation||2||75||35||60||18||54||20||23|
|SG110||Elbow or ankle||Flexion/extension, or dorsiflexion/plantarflexion
|SG150||Knee or hip||Flexion/extension and valgus/varus, or flexion/extension and abdudction/adduction||2||150||100||70||18||54||20||25|
|SG150/B||Back||Flexion/extension, lateral flexion||2||150||50||120||18||54||20||27|
|SG110||Neck||Flexion/extension, lateral flexion||2||110||70||60||18||54||20||23|
|F35||Finger (DIP, PIP, MCP) or toe||Flexion/extension||1||35||30||18||8||15||8||8|
(measurements in mm)
|Transducer type||strain gauge|
|Accuracyº||± 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.
'J' series cables, with locking connectors, are available in various lengths - J500 (500mm), J1000 (1000mm), J1500 (1500mm) - and connect the 'SG' and 'F' series goniometers and 'Q' series torsiometers to any of the Biometrics' interfaces. One cable per channel is required.
Attachment Tape T10
A pack of 10 rolls of medical grade double sided adhesive tape for attachment of all goniometers and torsiometers to the subject.