Biometrics’ goniometers 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 simultaneously measure angles in up to two planes of movement. The goniometer has two separate output connectors, one measures flexion/extension, the other radial/ulnar deviation or abduction/adduction. When used to measure a single axis joint such as the knee or elbow, or when measuring a single plane of a twin axis joint, simply connect one channel, the other remains redundant.
All SG series goniometers function the same way and come in a range of sizes to suit different joints, with direct connection to Biometrics’ Data Acquisition Systems:
|Joint||Output||No. of Channels||A Max (mm)
||A Min (mm)
|| B (mm)
|| C (mm)
|| D (mm)
|| E (mm)
|SG65||Wrist||Flexion/extension, radial/ulnar deviation||2||65||30||55||18||54||20|
|SG75||Wrist (large)||Flexion/extension, radial/ulnar deviation||2||75||35||60||18||54||20|
|SG110||Elbow or ankle||Flexion/extension, or dorsiflexion/plantarflexion and inversion/eversion||2||110||70||60||18||54||20|
|SG150||Knee or hip||Flexion/extension and valgus/varus, or flexion/extension and abduction/adduction||2||150||100||70||18||54||20|
|SG150/B||Back||Flexion/extension, lateral flexion||2||150||50||120||18||54||20|
|F35||Finger (DIP, PIP, MCP) or toe||Flexion/extension||1||35||30||18||8||15||8|
|Transducer Type||strain gauge|
||± 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.