Surface EMG Sensors
Biometrics Ltd. Surface EMG sensors and systems have been extensively researched and developed over several years incorporating the latest design principles and technologies to suit research needs for the analysis of muscle activity.
Surface EMG Sensors (Integral Electrodes)
Available as wireless or wired options, the sensors are unique to their designs as the amplifier's input impedance is of >100 Mohms, this means that little or no skin preparation is required without the need of any conducting gels.
The DataLITE wireless EMG sensor is small, lightweight and uses progressive frequency hopping, error detection and data recovery algorithms, allowing muscle activity readings to be smooth and robust even in a typical work environment with a range of up to 30 meters from its receiver.
Surface EMG Sensor (Wireless / Wired)
| DataLITE Wireless EMG Sensor | Wired EMG Sensor | |
|---|---|---|
| Product Ref | LE230 | SX230 |
| Dimensions | 42 x 24 x 14 mm | 37 x 20 x 6 mm |
| Mass | 17 g | 5 g (excluding cable and plug) |
| Bandwidth | 10 – 250, 470, 950, 5000Hz | 20 – 460Hz |
| Additional Bandwidths | N/A | 5Hz – 480Hz 5Hz – 1000Hz |
| Contact Diameter | 10 mm | |
| Contact Center Spacing | 20 mm | |
| Electrodes | Integral dry reusable | |
| CMRR @ 60 Hz (dB) | > 96 dB (typically 110 dB) | |
| Full Scale | User Select ±6000µV, ±6mV, ±2000µV, ±2mV, ±600µV, ±200µV, ±60µV |
+/- 3 mV Peak to Peak ± 1mV, ±3mV |
| Gain | Standard unit x1000 (100 also available) | |
| Input Impedance | >100 Mohms | |
| Accuracy | +/- 1.5% | +/- 2% full scale |
| Noise | ‹ 5µV | |
| Supply Voltage | N/A | +3.50 to +5.5 Vdc |
| Battery Life | Up to 8 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 | 1.25m cable (custom lengths available on request) |
| Compatible Interfaces | DataLITE PIONEER, ADVANCE, EXPLORE | DataLOG, DataLINK, Amplifier or 3rd party |
Surface EMG Amplifiers (Disposable Electrodes)
For applications where variable inter-electrode distance is desired, the DataLITE wireless LE230FW or the wired 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.
Surface EMG Amplifier (Wireless / Wired)
| DataLITE Wireless EMG Amplifier | Wired EMG Amplifier | |
|---|---|---|
| Product Ref | LE230FW | SX230FW |
| Dimensions | 42 x 24 x 14 mm Two 4 mm snap connectors on 100 mm wires |
38 x 20 Two 4 mm snap connectors on 100 mm wires |
| Mass | 17 g (excluding cable and plug) | 8g (excluding cable and plug) |
| Bandwidth | 10 – 250, 470, 950, 5000Hz | 20 – 460Hz |
| Additional Bandwidths | N/A | 5Hz – 480Hz 5Hz – 1000Hz |
| Contact Diameter | Dependant on electrode size | |
| Contact Center Spacing | Variable | |
| Electrodes | Disposable | |
| CMRR @ 60 Hz (dB) | > 96 dB (typically 110 dB) | |
| Full Scale | User Select ±6000µV, ±6mV, ±2000µV, ±2mV, ±600µV, ±200µV, ±60µV |
+/- 3 mV Peak to Peak ± 1mV, ±3mV |
| Gain | Standard unit x1000 (100 also available) | |
| Input Impedance | >100 Mohms | |
| Accuracy | +/- 1.5% | +/- 2% full scale |
| Noise | ‹ 5µV | |
| Supply Voltage | N/A | +3.50 to +5.5 Vdc |
| Battery Life | Up to 8 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 | 1.25m cable (custom lengths available on request) |
| Compatible Interfaces | DataLITE PIONEER, ADVANCE, EXPLORE | DataLOG, DataLINK, Amplifier or 3rd party |
Variable Gain & Adjustable Low Pass Filter
DataLITE wireless EMG sensors have two powerful additional features, allowing the researcher greater flexibility in adjusting the hardware to meet specific applications.
- The user has control over the bandwidth of the sensor from 10Hz to 250Hz through to 10Hz to 5000Hz.
- Increase the sensitivity of the EMG sensor with a choice of settings giving full scale peak to peak measurements ranging from +/- 60 microvolts to +/- 6 millivolts.
Biometrics Ltd. EMG 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:
EMG Consumables
The surface EMG electrodes (SEN3001) may be used with the EMG Amplifier (LE230FW / SX230FW) or R506/R606 ground strap. 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.
Double sided die cut tapes (T350) for attaching a wireless or wired EMG sensor. Hypoallergenic and latex free. 350 pieces of tape per pack.
When using a surface EMG sensor 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 (SEN3001) 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 |
EMG Systems
Technologically advanced yet cost-effective range of wireless, portable, and laboratory EMG data capture systems offering full portability and real-time display and analysis options.
Surface EMG Citations
Here are a few of our favourite studies using Biometrics Ltd surface EMG sensors
The Effect of Shin-Torso Alignment on Muscle Activity and Joint Angles of the Lower Extremity in Collegiate Ice Hockey Players
Pring, Noah A. et al.
International Journal of Exercise Science: Vol. 14: Iss. 1, Pages 552 - 562
Full body mobile brain-body imaging data during unconstrained locomotion on stairs, ramps, and level ground
Brantley, J., Luu, T., Nakagome, S. et al.
Vibration-Damping technology in tennis racquets: Effects on vibration transfer to the arm, muscle fatigue and tennis performance
I.-L. Yeh et al.