Biometrics Ltd precision bipolar, differential EMG sensors are available in two versions - the SX230 has integral electrodes with a fixed electrode distance of 20mm and the SX230FW that uses disposable electrodes and has a variable electrode distance.  Ninety percent of Biometrics Ltd customers use the SX230.

SX230 EMG Sensor

The SX230 sensor is an active probe manufactured by Biometrics Ltd providing superb quality of signal and ease of use. Unique to the design is the amplifier’s Input Impedance of > 10,000,000 M Ohms. What this means in practise is that little or no skin preparation and no conducting gels are required, yet the quality of the recorded signal is absolutely superb for both static and dynamic applications.

Extremely versatile - Depending on user requirements - the SX230 Active Probes readily connect to the Bluetooth DataLOG or the tethered DataLINK or the tethered General Amplifier K800.

All 3 instruments may be used to:-

• Display & record EMG only
• Integrate EMG with any or all other Biometrics Ltd sensors
• Readily synchronise EMG data with third party systems such as
  • Video motion capture such as Vicon, Qualysis, and Peak Performance
  • 3D force plate systems such as Kistler and AMTI
  • Data collection systems such as National Instruments A-D cards

The Biometrics Analysis Software, compatible with Windows VISTA and Windows XP, is a comprehensive tool for EMG and associated sensor analysis. The most commonly used EMG data analysis is included: Rectify, RMS, EMG Work Done, Integration, Mean Frequency, Median Frequency, Power Spectrum Frequency.

To use the SX230 - simply apply the electrodes over the body of the small or large muscles being measured using the die cut medical grade double sided adhesive tape (part no. T350).  With The Biometrics Ltd instruments, independent of the number of active EMG sensors being used at any one time only one of the following ground reference cables is required:

R206 comes complete with a convenient elasticated wrist band for ease of use.

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

R506 comes with a standard 4 mm snap connector to use with proprietary reusable or disposable electrodes with a 4 mm snap.

For applications where variable inter-electrode distance is desired - the SX230FW EMG Amplifier has the same superb signal pickup of the SX230. Instead of the integral electrodes of the SX230, the SX230FW has two flying wire leads for use with any reusable or disposable SEMG electrode incorporating a 4 mm snap.  The maximum inter-electrode distance is 170 mm and the minimum distance is dependent upon the size of the electrodes used.

The SEN3001 surface EMG electrode may be used with the SX230FW. The SEN3001 is a small (22 x 28 mm) silver/silver chloride EMG electrode designed for single or multiple applications to the same patient/subject.

Specifications

Surface EMG Electrode SX230-1000
Electrodes	integral dry reusable
Gain	standard unit 1000 (100 also available)
Bandwidth	20 Hz – 460 Hz
Noise	< 5 µV
Input Impedance	> 10,000,000 M Ohms
Supply Voltage	+3.50 to +10.0  Vdc
CMRR @ 60 Hz (dB)	> 96 dB (typically 110dB)
Cable	highly flexible grade, length 1.25 m (custom lengths on request)
Plug	direct connection to DataLOG , DataLINK or K800
Mass	5 g (excluding cable & plug)
Electrostatic Discharge Circuit protected

SX230FW Surface EMG Amplifier
Two 4mm snap connectors on 100mm wires	use with reusable or disposable SEMG electrodes with 4mm snap
Gain	standard unit 1000 (100 also available)
Bandwidth	20 Hz – 460 Hz
Noise	< 5 µV
Input Impedance	> 10,000,000 M Ohms
Supply Voltage	+4.0 to +5.0  Vdc
CMRR @ 60 Hz (dB)	> 96 dB (typically 110dB)
Cable	highly flexible grade, length 1.25 m (custom lengths on request)
Plug	direct connection to DataLOG , DataLINK or K800
Mass	12 g (excluding cable & plug)
Electrostatic Discharge Circuit protected

Application Tape T350

Double sided medical grade, Die cut for ease of application .  (350 pieces per pack)

SEN3001 Surface EMG Electrodes

Single patient/subject use. Multiple reapplications. (20 packs of 6 electrodes)