The comprehensive range of 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 and “Q” series single axis torsiometers provide improved mechanical integrity and electrical performance.

Biometrics’ sensors are sold separately or as part of complete measurement systems. Available systems include instrumentation for static angle readout, dynamic on line data acquisition in 2, 8, 16, 24, or 32 channel configurations, or fully portable wireless data collection.

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	SENSOR	MEASURED OUTPUT
wrist	SG65	flexion/extension, radial/ulnar deviation
wrist (large)	SG75	flexion/extension, radial/ulnar deviation
forearm	Q150	pronation/supination
elbow	SG110	flexion/extension
ankle	SG110 or SG110A	dorsiflexion/plantarflexion, inversion/eversion
knee	SG150	flexion/extension, valgus/varus
hip	SG150	flexion/extension, abduction/adduction
back	SG150B	flexion/extension, lateral flexion
neck	SG110	flexion/extension, lateral flexion
neck	Q110	axial rotation
finger DIP, PIP, MCP	F35	flexion/extension

Twin Axis Goniometers SG65, SG110, SG110/A, SG150, SG150/B

The “SG” series twin axis goniometers simultaneously measure angles in up to two planes of movement.  For example, to measure wrist movements, the endblocks of the SG65 goniometer are attached on the dorsal surface using double sided tape,(type. No. T10), one end over the third metacarpal, the other over the midline of the forearm, with the wrist in the neutral position.  The goniometer has 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, the other remains redundant.  All twin axis SG series goniometers function the same way, the difference being physical size.

Single Axis Goniometer F35

Biometrics’ goniometer F35 measures angles in one plane only. This smallest goniometer is designed to measure flexion/extension of finger or toe joints.

Single Axis Torsiometers Q110 and Q150

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.

Custon Design and Manufacturing

With the wide variety of applications for the sensor technology, Biometrics Ltd offers custom design and manufacturing to meet specific requirements.  For example, waterproof sensors with integrated leads for use in pools or with underwater treadmills or specialty sensors for lower gastro intestinal diagnostics.

Specifications

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.

TYPE	LENGTH	DESCRIPTION
J500	500 mm	Connection of Goniometers & Torsiometers to Biometrics’ Instrumentation
J1000	1000 mm	Connection of Goniometers & Torsiometers to Biometrics’ Instrumentation
J1500	1500 mm	Connection of Goniometers & Torsiometers to Biometrics’ Instrumentation