Surface EMG Sensor

Biometrics Ltd. offer a technologically advanced yet cost effective range of EMG sensors and data capture systems offering both full portability and real-time display and analysis options.

Our wired Surface EMG Sensor is an electromyography sensor available in two versions:

  1. Surface EMG Sensor (SX230) that has integral electrodes with a fixed distance of 20mm
  2. Surface EMG Amplifier (SX230FW) that uses disposable electrodes and has a variable electrode distance

Surface EMG Sensor

The Surface EMG Sensor (SX230) is an active sensor which provides superb quality of signal and ease of use. Unique to the design is the amplifier's input impedance of >10,000,000 M Ohms. This means in practice that little or no skin preparation is required and no conducting gels are required.

The sensor is extremely versatile, readily connecting to the portable DataLOG system, tethered DataLINK system or K800 Amplifier. All three instruments can be used to:

  • Collect and display EMG data
  • Integrate EMG data with data from other sensors
  • synchronize EMG data with third party systems such as:
    • Video motion captures e.g. Vicon, Qualisys, and Peak Performance
    • 3D force plate systems e.g. Kistler and AMTI
Electrodes Integral dry reusable
Gain Standard unit 1000 (100 also available)
Bandwidth 20Hz – 460Hz
Additional Bandwidths 5Hz – 490Hz
5Hz – 1000Hz
Noise ‹ 5µV
Input Impedance > 10,000,000 M Ohms
Supply Voltage +3.50 to +5.5 Vdc
CMRR @ 60Hz (dB) @ 96dB (typically 110dB)
Cable Highly flexible grade, length 1.25m (custom lengths on request)
Plug Direct connection to DataLOG, DataLINK or K800 Amplifier
Mass 5g (excluding cable and plug)

Surface EMG Amplifier

For applications where variable inter-electrode distance is desired, the Surface EMG Amplifier (SX230FW) has two flying wire leads for use with any reusable or disposable SEMG electrode incorporating a 4mm snap. The maximum inter-electrode distance is 170mm and the minimum distance is dependent upon the size of the electrodes used.

* Same specifications as the Surface EMG Sensor (SX230)
Electrodes Two 4mm snap connectors on 100mm wires use with reusable or disposable SEMG electrodes with 4mm snap
Mass 12g (excluding cable and plug)

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

  • Symmetry studies during gait
  • Timing data in Biomechanics
  • Work done and fatigue studies
  • Work environment and tool design
  • Education
  • Sports performance
  • Neuro Rehabilitation
  • Veterinary Science

The surface EMG electrodes may be used with the EMG Amplifier (SX230FW). The EMG electrode is a small (22 x 28 mm) silver/silver chloride electrode designed for single or multiple applications to the same patient/subject.

When using the surface EMG sensor (SX230) with any Biometrics Ltd instrument, independent of the number of EMG sensors used at any one time, only one of the following ground reference cables is required:

The R606 plastic ground strap has a standard 4mm snap connector and comes with convenient elasticated wrist bands for ease of use. The R606 may also be used with proprietary reusable or disposable electrodes having a 4mm snap.

The R506 metal ground strap is the same as the R606 and is required for the K800 Amplifier and older models of DataLOG and DataLINK interfaces.

The R306 ground strap comes with a standard 2mm spring plug for connection to proprietary disposable electrodes with a 2mm spring socket.

  R306 R606 / R506
Type Reusable
Cable Highly flexible grade, length 1.25 m Highly flexible grade, length 2 m
Application Connection to disposable electrodes
using a 2mm spring plug
Connection to reusable or disposable
SEMG electrodes with 4mm snap

Double sided die cut tapes for attaching Biometrics Ltd SX230 EMG sensors. Hypoallergenic and latex free. 350 pieces of tape per pack.