Wired EDA/GSR amplifier (BIOPAC EDA100D)

Name: Wired EDA/GSR amplifier (BIOPAC EDA100D)
SKU: 18543

A wired EDA/GSR amplifier from the BIOPAC Smart Amplifier series — measurement electronics placed close to the electrodes reduce interference and artifacts, and acquisition parameters configure automatically in AcqKnowledge. Requires the AMI100D interface and an MP160 or MP200 unit (not MP150), plus AcqKnowledge 5.0.4 or newer.

BIOPAC Smart Amplifier · Wired EDA/GSR Measurement

EDA100D is an amplifier from the Smart Amplifier series — measurement electronics placed directly at the electrode instead of in a module near the acquisition unit.

Thanks to the transducer's proximity to the electrode, the signal is less susceptible to electromagnetic interference (EMI) and motion artifacts, and acquisition parameters configure themselves automatically in AcqKnowledge once connected.

Part of a larger system

BIOPAC Smart Amplifier 100D module family — illustrative photo of the entire line (EDA100D is one of the modules in this family)

Illustrative photo of the entire Smart Amplifier 100D family — the EDA100D module has an identical housing.

EDA100D is an expansion module, not a standalone system

The EDA100D module itself does not record or store data on its own. It requires connection through the AMI100D interface to an MP160 or MP200 data acquisition unit (Smart Amplifier modules do NOT work with the MP150), together with AcqKnowledge software version 5.0.4 or newer.

In addition, EDA100D requires a separately ordered electrode lead — see the section below for details. The module connects via a 3 m RJ12 cable to the AMI100D interface, and the recorded signal is placed on a shared, synchronized timeline together with other modules in the system.

Required electrode lead

EDA100D is the amplifier alone — measurement requires a separately ordered electrode lead and electrodes.

EDA finger electrodes connected to the EDA100D module on a hand

Manufacturer (BIOPAC) photo — BN-EDA-LEAD2 lead with finger electrodes. BN-EDA-LEAD2 / BN-EDA25-LEAD2

EDA electrode lead

A dedicated lead connecting the EDA100D module to the electrodes — available in two lengths. Used with EL507 electrodes and/or GEL101A electrolyte gel.

BN-EDA-LEAD2 (15 cm) or BN-EDA25-LEAD2 (25 cm)
Electrodes: EL507 (dry, gel chamber) and/or GEL101A gel
Isolated input — several modules can be used simultaneously on the same subject

Key features

Electronics close to the electrode

The Smart Amplifier architecture places the amplifier right at the electrode — significantly reducing EMI interference and motion artifacts compared with a traditional module located near the acquisition unit.

Automatic configuration

Once connected, the module automatically configures acquisition parameters in AcqKnowledge — no manual switch settings required.

Isolated input

Several Smart Amplifier modules can be used simultaneously on the same subject, without mutual interference between channels.

Ag/AgCl electrodes only

Do not use electrodes with gold-plated contacts — their high input impedance causes charge build-up and distorts the EDA signal.

DC–10 Hzmeasurement bandwidth

0.5 VDCexcitation voltage

~48 gmodule weight

MP160/200compatibility (via AMI100D)

Full technical specification

Signal: Electrodermal activity (EDA/GSR)
Excitation voltage: 0.5 VDC (constant-voltage technique)
Bandwidth (wideband): DC – 10 Hz
LP filter: 3 Hz
HP filter: None (DC)
Output range: ±10 V
CMRR: Min. 120 dB
Required lead: BN-EDA-LEAD2 (15 cm) or BN-EDA25-LEAD2 (25 cm) + EL507 electrodes/GEL101A gel
Module dimensions / weight: Approx. 1.8×4.6×1.1 cm, approx. 48 g (amplifier alone approx. 9 g)
Cable: 3 m, RJ12, to the AMI100D interface
Electrodes: Ag/AgCl only — gold-plated electrodes cause charge build-up and distort the signal
Compatibility: MP160 or MP200 (via the AMI100D interface) + AcqKnowledge 5.0.4 or newer

Where to place the electrodes

Click the points on the photo to see the typical electrode placement for EDA — on the distal pads of the 2nd and 3rd fingers of the non-dominant hand.

The illustrative photo comes from BioNomadix materials — it also shows a wireless transmitter, which the EDA100D does not have (EDA100D is a wired Smart Amplifier module). The electrode placement on the fingers itself is the same, generally accepted EDA measurement convention, independent of the amplifier module. A ground electrode is not required.

Hand with EDA electrodes on the middle phalanges of the 2nd and 3rd fingers — illustrative photo from BioNomadix materials

How it works

Electrodes on the subject

EL507 electrodes with GEL101A gel connected via the BN-EDA-LEAD2 lead to the EDA100D module.

EDA100D + AMI100D + MP160/200

The module amplifies the signal right at the electrode and sends it via an RJ12 cable to the AMI100D interface, and from there to the acquisition unit.

Analysis in AcqKnowledge

Automatic channel configuration, SCL/SCR recording, and further analysis.

Experimental applications

EDA/GSR measurement supports research into sympathetic nervous system arousal and emotional responses.

Psychophysiology

Recording SCL and SCR as an indicator of arousal and response to stimuli.

Emotion research

Analysis of phasic and tonic changes in skin conductance in response to emotional stimuli.

Neuromarketing

Measuring autonomic responses to advertising materials and consumer stimuli.

Multi-signal research

EDA as one of the signals in protocols combining ECG, respiration, and other physiological parameters.

Frequently asked questions

How does EDA100D differ from the classic EDA100C module?

Which electrodes should be used with EDA100D?

Which acquisition systems does EDA100D work with?

Download materials click to expand

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Wired EDA/GSR amplifier (BIOPAC EDA100D)

Part of a larger system

EDA100D is an expansion module, not a standalone system