Electronic Goniometers

Specifications

	Wireless Twin-Axis Electrogoniometers	Wired Twin-Axis Electrogoniometers
Number of Axis	2
Digital inputs	2	0
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 Twin-Axis Electrogoniometers 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.   Joint Output No. of Channels A Max A Min B C D E F Weight (g) W65 Wrist (Pediatric) Flexion/extension, radial/ulnar deviation 2 65 30 55 18 56 22 12 24 W75 Wrist (Adult) Flexion/extension, radial/ulnar deviation 2 75 35 60 18 56 22 12 25 W110 Neck, Elbow or Ankle Flexion/extension, lateral flexion, flexion/extension, or dorsiflexion/plantarflexion and inversion/eversion 2 110 70 60 18 56 22 12 25 W150 Knee or Hip Flexion/extension and valgus/varus, or flexion/extension and abduction/adduction 2 150 100 70 18 56 22 12 27 W150/B Back Flexion/extension, lateral flexion 2 150 50 120 18 56 22 12 29 (measurements in mm)	Click to view Wired Twin-Axis Electrogoniometers 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 (Pediatric) Flexion/extension, radial/ulnar deviation 2 65 30 55 18 54 20 22 SG75 Wrist (Adult) Flexion/extension, radial/ulnar deviation 2 75 35 60 18 54 20 23 SG110 Neck, elbow or ankle Flexion/extension, lateral flexion, Flexion/extension, or dorsiflexion/plantarflexion and inversion/eversion 2 110 70 60 18 54 20 23 SG150 Knee or hip Flexion/extension and valgus/varus, or flexion/extension and abduction/adduction 2 150 100 70 18 54 20 25 SG150/B Back Flexion/extension, lateral flexion 2 150 50 120 18 54 20 27 (measurements in mm)
Compatible Interfaces	DataLITE PIONEER, ADVANCE, EXPLORE	DataLOG, DataLINK, Amplifier or 3rd party

Goniometric data includes: Angular displacements, velocities and accelerations; min, max, mean, repititions, number of events over or under a set threshold, percentage time spent in and out of set limits, time to min/max etc.

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.