Goniometers

Goniometers are ideal for quick, simple, and accurate measurement of dynamic 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.

Twin-Axis Goniometers

Twin-Axis Goniometers simultaneously measure angles in up to two planes of movement. To measure wrist movements, the endblocks of the Goniometer are attached on the dorsal surface, one end over the third metacarpal, the other over the midline of the forearm, with the wrist in neutral position.

Goniometers have two separate output connectors, one measures flexion/extension, the other radial/ulnar deviation. 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.

All Twin-Axis Goniometers function the same way, the difference being physical size and are available as wireless (W Series) or wired (SG Series) options.

Specifications

Wireless Twin-Axis Goniometers

Wired Twin-Axis Goniometers

Number of Axis

Digital inputs

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

Wireless Twin-Axis Goniometers

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)

Wired Twin-Axis Goniometers

	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 3^rd 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.

Twin-Axis Ankle Goniometer

Designed specifically for measurement of ankle motion in two planes. Attaching to the lateral aspect of the ankle, the SG110/A simultaneously measures ankle dorsiflexion/plantarflexion and inversion/eversion. This lateral placement of the goniometer has been the preferred choice of customers for many years. The standard SG110 is also available for customers desiring posterior placement on the ankle.

Compatible Interfaces: DataLOG, DataLINK, Amplifier or 3^rd party

Wired Twin-Axis Ankle Goniometer

	Joint	Output	No. of Channels	A Max	A Min	B	C	D	E	F	G	Weight (g)
SG110/A	Ankle	Dorsiflexion/plantarflexion, inversion/eversion	2	110	70	60	18	19	51	5.70	8.70	20

(measurements in mm)

Single-Axis Goniometer

Biometrics' Single-Axis Goniometer measures angles in one plane only. This smallest goniometer is designed to measure flexion/extension of finger joints and is available as a wireless (F35W) or wired (F35) sensor.

Compatible Interfaces: DataLITE, DataLOG, DataLINK, Amplifier or 3^rd party

Wireless Single-Axis Goniometer

	Joint	Output	No. of Channels	A	B	C	D Min	D Max	E	F	G	H	I
F35W	Finger (DIP, PIP, MCP)	Flexion/extension	1	9	6	18	30	35	15	300 (mm)	56	12	22

(measurements in mm)

Wired Single-Axis Goniometer

	Joint	Output	No. of Channels	A	B	C	D Min	D Max	E	F	G	H	I
F35	Finger (DIP, PIP, MCP)	Flexion/extension	1	9	6	18	30	35	15	340 (mm)	40	10	10

(measurements in mm)

Goniometer sensors and systems are used extensively in the fields of ergonomics, sports science and medical research where measurements are commonly taken for a wide range of applications such as:

Biomechanics
Ergonomics
Gait Analysis

Sports Science
Clinical Settings
& Many More!

Clinical ROM Assessment

Accurate measurements of upper and lower extremity ROM for evaluation and progress reporting for clinical rehabilitation

View E-LINK ROM Kit