Research instrumentation · Commercial product · 2013

ReThink EEG

A configurable ambulatory electrophysiology platform built as a complete product: low-noise acquisition electronics, embedded firmware, Wi-Fi streaming, local recording, desktop and mobile software, accessories, and customer support.

16 + 1EEG channels plus dedicated ECG

0.3 µVpublished RMS input noise

24+ hrstreaming and recording at 200 Hz

Production-intent enclosure, antenna, and electrode interface

A complete ambulatory system

System architecture

The engineering extended beyond the acquisition board. The product joined signal integrity, power, connectivity, storage, field updates, user software, and practical wear into one research workflow.

AFE

Low-noise acquisition

Sixteen EEG inputs and a dedicated ECG input used 24-bit conversion, active grounding, high input impedance, and a DC-coupled signal path.

Live or untethered

The unit could stream over standard Wi-Fi while recording locally, operate on an existing network, create a local access point, or route over the Internet.

Serviceable in the field

Expandable storage appeared as a high-speed USB mass-storage device; firmware updates used a copy-and-reboot workflow rather than a specialist programmer.

Research workflow

Windows and iOS software supported configuration and viewing, while the armband and standard electrode interfaces made the electronics usable in ambulatory studies.

Data pathElectrodesCondition24-bit sampleRecordStreamReviewExport

Published specifications

2013 product record

These values are preserved from the archived ReThink product materials. Configurable sampling and battery life depended on the selected acquisition mode.

Acquisition: 16 EEG channels + 1 ECG channel
Conversion: 24-bit ADC
Input noise: 0.3 µV RMS
Input impedance: 20 GΩ
Bandwidth: DC–100 Hz
Sampling: Configurable; 300 Hz listed
Motion: Integrated 3-axis accelerometer
Wireless: 802.11b/g Wi-Fi · RP-SMA antenna
Storage: Expandable onboard storage · USB mass storage
Battery: 2,000 mAh Li-polymer
Enclosure: 3.6 × 2.5 × 0.8 inches
Electrodes: Active ground · 1.5 mm DIN options

* The 24+ hour figure was specified while streaming all channels over Wi-Fi and recording locally at 200 Hz.

Hardware and wear

Development artifacts

The custom board and enclosure were designed together, with a wearable carrier and standard connector options completing the physical system.

Custom ReThink EEG circuit board with its 24-bit acquisition electronics — **Custom acquisition PCB** · analog front ends, conversion, processing, storage, and wireless integration

ReThink EEG acquisition unit fitted into its ambulatory armband — **Ambulatory carrier** · included armband for practical research use

Rear three-quarter view of the ReThink EEG device and electrode connector — **Device interface** · replaceable antenna, USB, and multi-electrode connector

From prototype to supported product

Commercial delivery

ReThink EEG launched publicly in June 2013. The archived site documents configurable ordering, academic pricing, accessories, software downloads, and a customer support portal.

2013

Commercial launch

The first public ReThink Medical product, offered as quote-based research instrumentation rather than a general-purpose consumer device.

Historical status: research use only; no diagnostic or FDA-clearance claim.

Product and support scope

Configurable channel and sample-rate options
Concurrent Wi-Fi streaming and local recording
Windows acquisition interface
iOS viewing application
USB data access
Copy-and-reboot firmware updates
Armband and DIN cable included
Optional StatNet cable
Academic discount program
Authenticated customer download portal
Published specifications and accessories
Standard network or local access-point modes

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