Technical Data

Bluetooth

eSense Muscle

• Two-channel EMG biofeedback device
• Bluetooth 5.0 transmission to PC or smartphone/tablet (Android and iOS)
• Fixed Li-Ion battery 1600mAh for up to 12h continuous operation
• Two bipolar EMG inputs (CH1+, CH1-, CH2+, CH2-); one Analog Ground
• Two multifunction buttons for using the device
• One RGB LED to show the operating status
• 24-bit ADC and preamplifier for each channel
  • A native sampling at 2 kHz per channel.
• Three bandpass filters (Bessel, 8th order) per channel. -3dB cut-off frequencies: BP1: 20..950Hz, BP2: 20..300Hz, BP3: 100..200Hz
• RMS calculation and moving average over 0.5 seconds. Decimation to 100 RMS samples per second
• 200mV differential measuring range per channel
• 0.024 μV ADC resolution per LSB
• < 1.7 μV RMS noise BP1
• < 1.3 μV RMS noise BP2
• < 0.8 μV RMS noise BP3
• Channel 1 and 2 CMRR at 50Hz and 60Hz: better -105dB
• Protection against electrostatic discharge (ESD) up to +-15kV according to the “Human Body Model,” IEC 1000-4-2, Air-Gap Discharge
• HF-filter
• Operating mode: continuous operation
• Measurement accuracy EMG amplifier / ADC
  • Reinforcement: ± 5 % basic accuracy, ± 0.2 % after calibration
• Operating range: 5-40 °C, <= 95% relative humidity