Mindfield eSense Muscle - Sensor for iPhone & Android

The eSense Muscle can measure and evaluate electromyographic activity and transmit it to a terminal device via Bluetooth.

The musculature of the human being plays an essential role in the body. Our muscles are the largest energy consumer and are responsible for about 70-80% of our body weight. Muscle activity is manifested along the fibers of a striated muscle in the form of permanent, electrical potential shifts. This electrical activity can be measured at the skin surface in the form of more considerable summation potentials. This form of measurement is called (surface) electromyography, and the result is an electromyogram.

Transverse striated muscles are controlled by our somatic nervous system and are subject to voluntary control . Every volitional action of a muscle can therefore be observed in an electromyogram. Thus, the tension of a muscle on 27 which surface EMG electrodes are placed immediately leads to increased trace in the EMG signal.

However, involuntary reactions , such as stress, inner tension, and emotional experience, can also be measured as (tonic) activity in the EMG. EMG biofeedback can also report back the general psychophysiological tension. The interplay between the autonomic and somatic nervous systems can be depicted particularly well in the EMG. Increased muscle tone is mainly based on an increase in sympathetic activity. A decrease can be attributed to more robust parasympathetic activation. The eSense EMG device is easy to use and provides instant biofeedback.

• Mindfield® eSense Muscle Sensor incl. 1600mAh lithium polymer battery for approx. 12 hours of continuous operation
• Clip to fixate the sensor unit at the clothing
• Electrode cable set for connecting up to 3 electrodes for the use of the EMG device
• USB-C charging cable and charger
• Bluetooth® dongle for Windows, if your PC does not have Bluetooth® (please refer to the enclosed instructions)
• 50 pieces of EMG surface electrodes
• 50 pieces of alcohol swabs for cleaning the skin
• eSense Muscle Web App from Mindfield, available at www.esense-muscle.com
• Detailed instructions for effective biofeedback training.

Manuals and Data Sheets

eSense Muscle Quick Start Guide

eSense Muscle User Manual

Specifications

• 2-channel EMG biofeedback device
• Bluetooth® 5.0 transmission to PC or smartphone / tablet (Android and iOS)
• Built-in Li-Ion battery 1600mAh for up to 12 hours of uninterrupted operation
• 2 bipolar EMG inputs (CH1 +, CH1-, CH2 +, CH2-), 1 x analog ground
• 2 multifunction buttons for operating the device
• 1 RGB LED to display the operating status
• 24 bit ADC and preamplifier for each channel, native sampling with 2 kHz per channel
• 3 Bandpass filter (Bessel, 8th order) per channel. -3dB. Limit 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 discharges (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, amplification: ± 5% basic accuracy, ± 0.2% after calibration, bandpass lower and upper limit frequency: ± 0.1%, sampling frequency: better than ± 0.1% (Resonator)
• Operating range: 5-40 ° C, <= 95% relative humidity