Wired EGG amplifier (BIOPAC EGG100D)

A wired electrogastrography (EGG) amplifier from the BIOPAC Smart Amplifier series — it records the slow-wave electrical activity of the stomach with a very narrow band (HP 0.005 Hz / LP 1 Hz). Measurement electronics at the electrode 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 · Electrogastrography (EGG)

EGG100D is a Smart Amplifier series amplifier for recording the slow-wave electrical activity of the stomach (EGG) — the measurement electronics sit directly at the electrode, instead of in a module near the acquisition unit.

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

Part of a larger system

BIOPAC Smart Amplifier 100D module family — illustrative photo of the whole line (EGG100D is one of the modules in this family)

Illustrative photo of the entire Smart Amplifier 100D family — the EGG100D module has an identical housing.

EGG100D is an expansion module, not a standalone system

The EGG100D module by itself does not record or store data on its own. It requires connection via the AMI100D interface to an MP160 or MP200 data acquisition unit (Smart Amplifier modules do NOT work with the MP150), together with AcqKnowledge version 5.0.4 or newer.

EGG100D uses the same general-purpose biopotential lead BN-EL*-LEAD2/LEAD3 as other biopotential modules in this series, together with electrodes — see the section below for details.

Required electrode lead

EGG100D is the amplifier itself — a separately ordered electrode lead and electrodes are needed for measurement. This module has no dedicated lead — it uses the same general-purpose biopotential lead as other 100D modules in this series.

Universal BN-EL biopotential lead with a 100D module

Manufacturer photo (BIOPAC) — BN-EL-LEAD2 biopotential lead, shared across ECG/EMG/EOG/EGG/EEG. BN-EL*-LEAD2 / LEAD3

General-purpose biopotential lead

A shared, universal electrode lead used across multiple biopotential modules in the 100D series (not a part dedicated solely to EGG100D). Indirect sources (manufacturer materials not directly confirmed, due to lack of access to biopac.com from this research environment) indicate that EGG100D is likely used with electrodes from the EL500 series on the abdominal skin surface — we treat this as medium-confidence information, to be verified when configuring the order.

BN-EL*-LEAD2 or BN-EL*-LEAD3 — the shared biopotential lead for this series
Electrodes: likely the EL500 series (medium-confidence information, not directly confirmed)
Ag/AgCl electrodes only — see the "Electrodes" row in the specification

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 near the acquisition unit.

Automatic configuration

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

Very narrow band for gastric slow waves

HP 0.005 Hz / LP 1 Hz filters give the narrowest band in the entire 100D family — matched to the very slow nature of gastric electrical activity (so-called slow waves), which is orders of magnitude slower than typical biopotential signals (such as ECG or EMG).

Ag/AgCl electrodes only

Gold-plated electrodes should not be used — their high input impedance causes charge build-up and distorts the recorded signal.

×2000gain

0.1 µV rmsinput noise

0.005–1 Hzmeasurement band

MP160/200compatibility (via AMI100D)

Full technical specification

Signal: Electrogastrogram (EGG) — slow-wave electrical activity of the stomach
Gain: ×2000
Input noise: 0.1 µV rms
Filters: HP 0.005 Hz / LP 1 Hz — the narrowest band in the 100D family, matched to gastric slow waves
Derived signal: None — the module provides only the raw waveform signal, with no computed derived signal
Output range: ±10 V
CMRR: Min. 120 dB
Required lead: BN-EL*-LEAD2/LEAD3 (shared biopotential lead for the series) + electrodes likely from the EL500 series (medium-confidence information, not directly confirmed — see the "Required electrode lead" section)
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 silhouette to see the approximate placement of EGG electrodes on the abdominal skin surface, along the axis of the stomach.

Illustrative points, based on the commonly accepted convention for electrode placement in electrogastrography — this is NOT a confirmed, dedicated BIOPAC scheme for the EGG100D module. The exact number of electrodes and their spacing depend on the research protocol adopted.

Generic body silhouette — front view, approximate placement points for EGG electrodes on abdominal skin

How it works

Electrodes on the abdomen

Electrodes connected via the BN-EL*-LEAD2/LEAD3 lead, placed along the axis of the stomach on the abdominal skin surface.

EGG100D + AMI100D + MP160/200

The module amplifies the slow-wave 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 and recording of the raw gastric slow-wave signal for further analysis.

Experimental applications

Electrogastrography supports research into gastrointestinal motility and its links to the central nervous system.

Gastric motility research

Recording the slow-wave electrical activity of the stomach as an indicator of rhythm and gastrointestinal motility disorders.

Brain–gut axis

Analysis of the links between gastric activity and processes in the central nervous system in brain–gut axis research.

Pharmacology of peristalsis

Assessment of the effect of pharmacological substances on the rhythm and course of gastric peristalsis.

Research on functional gastrointestinal disorders

Supporting research into functional gastrointestinal disorders using EGG recording.

Frequently asked questions

How does EGG100D differ from the classic EGG100C module?

Which electrodes should be used with EGG100D?

Which acquisition systems does EGG100D work with?

Download materials click to expand

Interested in this product?

Wired EGG amplifier (BIOPAC EGG100D)

Part of a larger system

EGG100D is an expansion module, not a standalone system