- Patented Parallel-Bar Technology
- Triaxial Accelerometer in each sensor
- Guaranteed performance to 40 m
- 37mm x 26mm x 15mm, 14g
- 8 hours of operation in full transmission mode
- 2 hour recharge time
Our patented approach uses two EMG inputs with proprietary stabilizing references. This proprietary design allows the sensor to react instantaneously to disturbances detected on the surface of the skin, dramatically reducing the impact of these noise sources on the detected EMG signal quality. The Trigno™ Sensor System is protected by US Patents 6480731, 6238338 and European Patent EP1070479.
Large contact areas and electrode distances >10 mm introduce a high risk of crosstalk from adjacent and underlying muscles. EMG content resulting from crosstalk cannot be distinguished from the muscle of interest.
The small inter-electrode distance of Delsys sensors rejects EMG signals originating from distant sources, effectively focusing the sensor’s detection abilities to muscles immediately below the skin.
Passive snap-style electrodes suffer from artifacts generated by cable movement and by mismatched electrode movement during activities.
In contrast, the patented Trigno™ design amplifies the signal at the source and precludes mismatched electrode movement, removing the major sources of artifacts.
Varying this distance between trials and across subjects can introduce artificial variability in the recorded data. The use of traditional snap-style electrodes often imposes these inconsistencies into the data because of the difficulty in achieving a consistent, repeatable placement.
Trigno™ Sensors remove this problem by guaranteeing a fixed electrode distance of 10 mm under all conditions.
Delsys, Inc. products are biofeedback devices, designed for research investigations and educational purposes only. Delsys, Inc. products are not intended for medical measurements purposes or not for the use in the treatment and diagnosis of disease.
|Typical Operating Range1||40 m|
|RF Frequency Band||2400-2483 MHz (ISM band)|
|Power Consumption||< 65 mW|
|Effective Radiated Power||9mW|
|Case Dimension||27 x 37 x 15 mm|
|Full-charge Operation Time2||8 hours (typical)|
|Recharge Time3||< 2.5 hours|
|Auto Shut-down timer||300 seconds|
|Temperature Range4||5-50 degrees Celsius|
- Range is characterized in normal office environments. Interfering RF sources in the 2.4GHz spectrum, as well as absorptive objects occluding the RF communication path may degrade transmission distance. Stated range can be exceeded under favorable RF conditions.
- Battery duration is a function of charge and discharge conditions. Optimal battery performance is obtained when the device is operated at room temperature. Note that the stated Operation time reflects the expected performance of a fully charged new battery used in a sensor that is transmitting data. Operation time is expected to decrease as a function of charge cycles, and when the sensor is searching for a network.
- 80 % of original battery capacity is maintained after 300 discharged/recharge cycles or after 2 years. If recharge cycles are less than 300. These values represent typical expectations under normal conditions. Actual performance will vary depending on usage conditions.
- Operation beyond these temperature limits may damage the rechargeable battery.
|Range1||11 mV (r.t.i.)|
|Resolution (EMG Signal)2||168 nV/bit (LSB)|
|Bandwidth (EMG signal)||20 ± 5 Hz > 40 dB/dec
450 ± 50 Hz > 80 dB/dec
|Overall Channel Noise||<0.75uV|
|Sampling Rate||1926 samples/sec|
|Number of Contacts||4|
|Contact Dimensions||5 x 1 mm|
|Contact Material||99.9 % Silver|
- Range is characterized for the input of the EMG sensor and is sampled with 16 bits.
- ADC Resolution is specified for the input of the sensor.
- Filter is designed as a maximally flat Butterworth to preserve EMG signal amplitude and phase linearity.
- Input-referred noise is calculated as a root mean square over a 5 second window sampled at 2kHz
- CMRR is measured for a minimum 1V common square mode input signal at a frequency of 60 Hz
- EMG signal sampling rate is intrinsic to the sensor and cannot be changed. This has been optimized for the communication bandwidth and signal conditioning designs
- Sensor skin contacts are made from pure silver and should not be used if allergic reactions to silver are expected or found to occur.
|Number of Axis||3 DOF|
|Range||± 1.5 g
± 4 g
± 6 g
± 9 g
|Sampling Resolution||0.0040 ± 0.0003 g/bit (at ± 1.5g)
0.0105 ± 0.0006 g/bit (at ± 4g)
0.016 ± 0.001 g/bit (at ± 6g)
0.039 ± 0.004 g/bit (at ± 9g)
|Accelerometer Noise||0.007g (rms, ± 1.5g)
0.016g (rms, ± 4g)
0.024g (rms , ± 6g)
0.061g (rms, ± 9g)
|Bandwidth||DC – 50 ± 5Hz, 20 dB/dec|
|Offset Error||± 0.201g (XY, ± 1.5g)
± 0.201g / -0.343g (Z, ± 1.5g)
± 0.055g (XY, ± 4g)
± 0.055g / -0.087g (Z, ± 4g)
± 0.052g (XY, ± 6g)
± 0.052g / -0.088g (Z, ± 6g)
± 0.015g (XY, ± 9g)
± 0.015g / -0.025g (Z, ± 9g)
|Sampling Rate||148.1 samples/sec|
- Accelerometer range is software selectable.
- Resolution is calculated with 8 bits over the full 3.3v dynamic range, encompassing accelerometer ideal maximum outputs of ±2.1g and ±8.0 g. Ratings exceeding the nominal range may be non linear and are not guaranteed.
- Calculated over a 50 Hz bandwidth and 10 bits of resolution.
- Offset errors can be nulled in software by referencing measurements to the 1g output readings.
- Accelerometer sampling rates are intrinsic to the sensor and cannot be changed.