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Specialist Amps
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Biopac EBI100C Electrical Bioimpedance Amplifier Module

The EBI100C Electrobioimpedance Amplifier records the parameters associated with impedance cardiography, cardiac output measurements, thoracic impedance changes as a function of respiration or any kind of biological impedance monitoring.
Code
EBI100C

Biopac EBI100C Electrical Bioimpedance Amplifier Module

The EBI100C Electrobioimpedance Amplifier records the parameters associated with impedance cardiography, cardiac output measurements, thoracic impedance changes as a function of respiration or any kind of biological impedance monitoring. The EBI100C incorporates a precision high frequency current source, which injects a very small (400 µA) current through the measurement tissue volume defined by the placement of a set of current source electrodes. A separate set of monitoring electrodes then measures the voltage developed across the tissue volume. Because the current is constant, the voltage measured is proportional to the characteristics of the biological impedance of the tissue volume. Click below for ICG Analysis video...

The EBI100C measures both impedance magnitude and phase simultaneously. Impedance can be recorded at four different measurement frequencies, from 12.5 kHz to 100 kHz.

Output Channels
The CH SELECT switch has four bank settings, which assign EBI100C output (i.e. Magnitude or Phase) channels as follows:

Bank Magnitude (MAG) Phase (PHS)
1 Channel 1 Channel 9
2 Channel 2 Channel 10
3 Channel 3 Channel 11
4 Channel 4 Channel 12

If a particular EBI100C output is not used, the respective assigned channel cannot be used for another modules output; simply do not record on the assigned but unwanted channel.

Possible Lead Configurations

   1. Human, Absolute, Shielded:
      LEAD130 lead with EL506 bioimpedance strip or EL500 paired disposable electrodes.
   2. Human, Absolute, Unshielded:
      8 LEAD110 leads with 4 CBL204 Touchproof "Y" lead adapters and EL500 paired disposable electrodes.
   3. Human, Relative Measures, Unshielded or Small Animal or EBI-specific Measures (flow, plethysmography, etc.):
      4 LEAD110 leads with EL506 bioimpedance strip or EL500 paired disposable electrodes.

EBI100C Specifications:

Number of Channels: 2—Magnitude (MAG) and Phase (PHS)
Outputs:
MAG of Impedance (0-1000 Ohms)
PHS of Impedance (0-90)
Output Range: ±10 V (analog)
MAG Gain Range: 100, 20, 5, 1 Ohm/volt
MAG LP Filter: 10 Hz, 100 Hz
MAG HP Filter: DC, 0.05 Hz
MAG Sensitivity: 0.0015 Ohm @ 10 Hz BW - MP System
PHS Gain: 90° = 10 volts output
PHS LP Filter: 100 Hz
PHS HP Filter: DC coupled
PHS Sensitivity: 0.0025° @ 10 Hz BW - MP System
CMIV:
±10 V (referenced to amplifier ground)
±1500 VDC (referenced to mains ground)
Operational Frequencies: 12.5, 25, 50, 100 kHz
Current Output: 400 µA (rms) - constant sinusoidal current
Signal Source: Electrodes (four electrode leads required)
Weight: 370 grams
Dimensions: 4 cm (wide) x 11 cm (deep) x 19 cm (high)

Grounding
When using the EBI100C amplifier with other biopotential amplifiers attached to the same subject, it's not necessary to attach the ground lead from the biopotential amplifier(s) to the subject. The subject is already appropriately referenced to the subject via the attachment to the EBI100C. If a biopotential ground is attached to the subject, then currents sourced from the EBI100C will be split to the biopotential amplifier ground lead, potentially resulting in measurement errors.

Derivative Polarity EBI100C vs. NICO100C
EBI100C calculates derivative in the software and the software result is negative.
NICO100C calculates derivative in the hardware device and the result is inverted to create positive peaks.