Untether your Neuroscience

EEG in the lab or on the go

Event Related Potentials (ERPs) are used experimentally to investigate the neural correlates of a wide range of cognitive processes, such as those involved in attention, memory, language, or behavior.

Small enough to fit in the palm of your hand, our Quest HD processors enable a variety of mobile, wearable, HD EEG/ERP and cognitive neuroscience applications. With solutions available for up to 256 channels of EEG and up to 64 additional peripheral channels, the Quest HD processors are ideal for your multi-modal, psychophysiology experiments.

Co-register stimulus markers in your EEG data with millisecond precision to ensure consistent and accurate time-locking of your ERPs while streamlining EEG/ERP analysis workflow.

 Highlights

  • Turn-Key usability – Ripple Neuromed provides all the necessary components for recording EEG data, either in lab or on the go. Explorer EEG caps mate directly with our active front ends.
  • Broad electrode and cap support – Ripple Neuromed provides our users with adapters to connect to most EEG electrode technologies, allowing them to continue using caps or nets they have in house or that are specific to their research.
  • Unmatched experimental flexibility – With the Quest HD system, you can use the stimulus presentation system of your choice and reliably record stimulus markers synced to neural data.
  • Standardized Data Format – With data saved both as proprietary NEV files and standard EDF+, port your data into the analysis software of your choice or develop custom analysis code in MATLAB or Python.

Work with our expert sales team to configure these systems to provide the exact tool you need for your research.

32-256

Channels of EEG

64

additional peripheral channels for multi-modal psychophysiology experiments

Complete turnkey acquisition solution – configure your lab in a typical 2-room ERP laboratory or mobile ERP

Support for various EEG electrode types including caps and nets

Flexibility to use stimulus presentation system of your choice

Industry leading 20 bits of Digital Inputs & 20 bits of Digital Outputs

Learn more about our Quest HD system solutions:

Quest HD

Turn-Key Mobile EEG and ERP

Small and lightweight, the Quest HD frees your subjects to move freely and engage in natural behavior. Capable of true high density recording with a max channel count of up to 512 channels, with 24-bit resolution and sampling rate of 7.k ksps for the highest quality data.

Integrating with the Explorer line’s Compass software allows for turn-key setup with automatic device and accessory recognition, and an array of useful features including real-time impedance measurement, integrated video tracking through multiple USB cameras, and graphical control of ERP triggers and configuration.

The Quest HD elimates the need for cables, featuring wireless data transmission, an integrated battery, and internal data storage. With on-board processing, and a bevy of inputs and outputs, and a powerful yet user-friendly API, the Quest HD can be custom programmed for your unique paradigms with real-time control of external devices, stimulators and trackers. In addition to EEG and ERPs, the Quest is also compatible with the Explorer EMG front end for concurrent bipolar EMG recordings.

Highlights

  • A completely wearable EEG/ERP solution, with wireless communication and on-board data storage
  • On-board processing and an easy-to-use API for custom applications
  • Meets safety standards for laboratory and clinical research

Specifications

Quest HD Processor

Number of Channels up to 512
Analog I/O up to 28 inputs and 28 outputs
Digital I/O up to 20 input and 20 outputs, plus 2 strobes
Battery Life Internal, up to 2 hours; External, 4 – 6 hours
Data Communication with PC Gigabit Ethernet or Wi-Fi
Dimensions 183 mm x 95 mm x 36 mm
Weight 700 g

Recording

Resolution 24-bit
Inferred Noise <1 μVrms
Common Mode Rejection Ratio -110dB
Input Range Min ± 0.1875 V at a gain of 24
Input Range Max ± 2 V at a gain of 1
Input Impedance 1 GΩ, 20 pF

Quest HD+Stim

Concurrent Transcranial Stimulation and Electroencephalography

Adding to the mobility and features of the Quest HD, the Quest HD+Stim add the ability to do concurrent tCS along with your EEG and ERP recordings.

Powerful on-board processing allows for generation of complex waveforms, allowing you to use common tCS modalities (such as tDCS, tACS, tPCS or tRCS) or experiment with novel waveforms, even modulating or creating stimuli based on the subject’s behavioral or electrophysiological responses. Stimulation can be applied to any of the recording channels, with a switch time of less than a millisecond.

Highlights

  • Concurrent tCS and EEG/ERP
  • Selectable stimulation channels (switch time < 1ms)
  • Closed-loop control of tCS parameters
  • All of the mobility and features of the Quest HD
  • Meets safety standards for laboratory and clinical research

Specifications

Quest HD Processor

Number of Channels up to 512
Analog I/O up to 28 inputs and 28 outputs
Digital I/O up to 20 input and 20 outputs, plus 2 strobes
Battery Life Internal, up to 2 hours; External, 4 – 6 hours
Data Communication with PC Gigabit Ethernet or Wi-Fi
Dimensions 183 mm x 95 mm x 36 mm
Weight 700 g

Recording

Resolution 24-bit
Inferred Noise <1 μVrms
Common Mode Rejection Ratio -115dB
Input Range Min ± 0.1875 V at a gain of 24
Input Range Max ± 2 V at a gain of 1
Input Impedance 300 MΩ, 150 pF

Stimulation

Current Range 100 μA – 15 mA
Compliance Voltage ± 9 V to ± 30 V (configurable)
Pulse Width Min 33μs
Bandwidth DC to 120kHz

The EEG family of front ends were designed for noninvasive surface electrodes. As the name implies, it is designed with EEG specifically in mind, however it is suitable for any surface recordings that do not require bipolar or true differential referencing (for these applications the Physio16 is recommended). The stimulation version, the EEG+tES, is designed for stimulation from surface electrodes, such as transcranial stimulation (tCS), or transcutaneous nerve or spinal stimulation (TENS, TSS).

EEG and EEG+tES

Features

  • Compatible with any passive EEG cap
  • Small, multichannel amplifier combines the signal quality of active caps with the ease-of-use and robustness of passive caps
  • Combined with the Quest HD, is ideal for Mobile EEG/ERP
ripple-eeg-view-5-explorer2

Primary Use Cases

  • EEG
  • ERP
  • tCS
  • TENS
  • TSS

Specifications

EEG
Compatible Processors Nomad or any Quest HD
Channels 32 or 128, single reference
Bit Depth 24-bit
Resolution 0.022 μV/bit
Sample Rate 7.5 ksps
Bandwidth DC to 2kHz
CMMR 110 dB
Inferred Noise <1 µVrms at 7.5 ksps
Input Range Min ± 0.1875 V at a gain of 24
Input Range Max ± 2 V at a gain of 1
Input Impedance 1 Gohm, 20 pF
EEG+tES
Compatible Processors Nomad or Quest HD+stim
Channels 32 or 128, single reference
Bit Depth 24-bit
Resolution 0.022 μV/bit
Sample Rate 7.5 ksps
Bandwidth DC to 2kHz
CMMR 110 dB
Inferred Noise <1 µVrms at 7.5 ksps
Input Range Min ± 0.1875 V at a gain of 24
Input Range Max ± 2 V at a gain of 1
Input Impedance 1 Gohm, 20 pF
Stimulation Waveforms tDCS, tRNS, tACS, tPCS, user defined
Stimulation Current Range ±15 mA
Compliance Voltage ±9 to 30V (configurable)
Min Pulse Width 33 µs
Stimulation Frequency up to 15kHz

The Explorer line offers two families of front ends for invasive recordings, the Micro2 and the Macro. The Micro2 was designed with high-impedance, micro electrodes in mind. Capable of recording single units, it has a sampling rate of up to 30 ksps. The Micro2+stim is capable of stimulating on all channels simultaneously, making it ideal for all manner of research applications. To avoid delivering excess power to high-impedance electrodes, the Micro2+stim has a lower maximum per channel current compared to the macro

The Macro was designed for standard clinical electrodes. Compared to the Micro2, it has a more focused bandwidth to optimize it for applications such as high-resolution ECoG or sEEG. The Macro2+Stim maximum stimulation current is higher to match common clinical stimulators, while limiting current flow to one anode and one cathode per 16 channel bank to prevent excessive discharge. However, due to the fast switching times common to all Ripple Neuromed stimulating front ends, all channels can be effectively stimulated at once by using interleaved pulse trains.

Macro and Macro+stim Front Ends

Features

  • Compatible with macro and microelectrodes
  • 1.5mm touchproof connector interface
  • Constant current and constant voltage output modes
  • One selectable stimulation channel (switch time < 1ms)
  • Monopolar or bipolar waveforms
  • Programmatic control of waveforms and train parameters
ecogstim-explorer-green2

Primary Use Cases

  • ECoG
  • sEEG
  • LFPs
  • DBS
  • Closed-Loop Stimulation

Specifications

Macro
Compatible Processors Nomad
Channels 32 or 128, single reference
Bit Depth 24-bit
Resolution 0.022 μV/bit
Sample Rate 7.5 ksps
Bandwidth DC to 2kHz
CMMR 110 dB
Inferred Noise <1 µVrms at 7.5 ksps
Input Range Min ± 0.1875 V at a gain of 24
Input Range Max ± 2 V at a gain of 1
Input Impedance 1 Gohm, 20 pF
Macro+stim
Compatible Processors Nomad
Channels 32 or 128, single reference
Bit Depth 24-bit
Resolution 0.022 μV/bit
Sample Rate 7.5 ksps
Bandwidth 0.03 Hz to 2kHz
CMMR 110 dB
Inferred Noise <1 µVrms at 7.5 ksps
Input Range Min ± 0.1875 V at a gain of 24
Input Range Max ± 2 V at a gain of 1
Input Impedance 1 Gohm, 150 pF
Stimulation Current Range ±15 mA
Compliance Voltage ±9 to 30V (configurable)
Min Pulse Width 33 µs
Stimulation Frequency up to 15kHz




Micro2 and Micro2+stim Front Ends

Features

Features

  • High resolution, high sampling rate (30 ksps) recording
  • Stimulation on all channels
  • Programmatic control of waveforms and train parameters

Primary Use Cases

  • Single unit/multi-unit activity
  • ECoG
  • LFPs
  • Closed-Loop Stimulation
Micro2
Compatible Processors Nomad
Channels 32, single reference
Bit Depth 24-bit
Resolution 0.125, 0.25, or 0.5 μV/bit
Sample Rate 30 ksps
Bandwidth 0.1 Hz to 2 kHz
CMMR 82 dB
Inferred Noise 2.1 µVrms
Input Range Min ± 4 mV
Input Range Max ± 12 V
Micro2+stim
Compatible Processors Nomad
Channels 32, single reference
Bit Depth 24-bit
Resolution 0.125, 0.25, or 0.5 μV/bit
Sample Rate 30 ksps
Bandwidth 1 Hz to 7.5 kHz
CMMR 82 dB
Inferred Noise 2.1 µVrms
Input Range Min ± 4 mV
Input Range Max ± 12 mV
Stimulation Current Range ±1.5 mA
Compliance Voltage ±8.5V
Min Pulse Width 33 µs
Stimulation Frequency up to 15kHz

The Physio was designed specifically with electromyography in mind, although can be used for any type of electrophysiology from the body, such as ECG or noninvasive peripheral nerve recordings. It comes in both a 32 channel shared reference version, as well as a 16 channel bipolar version. The Physio does not have a stimulating version, but can be used with stimulating front ends for applications that need stimulation, such as electrically evoked potentials.

Physio 16 and Physio 32 Front Ends

Features

  • 16 differential pairs or 32 single-ended channels
  • Designed for bipolar EMG or single-ended HD EMG recordings
  • 52 mm x 36 mm x 4.75 mm
  • 13.5 g
emg

Primary Use Cases

  • EMG
  • MEP
  • Noninvasive Peripheral Nerve recordings

Specifications

Physio16
Compatible Processors Nomad or any Quest HD
Channels 16, true differential referencing
Bit Depth 24-bit
Resolution 0.022 μV/bit
Sample Rate 7.5 ksps
Bandwidth DC to 2kHz
CMMR 110 dB
Inferred Noise <1 µVrms at 7.5 ksps
Input Range Min ± 0.1875 V at a gain of 24
Input Range Max ± 2 V at a gain of 1
Input Impedance 1 Gohm, 20 pF
Physio32
Compatible Processors Nomad or any Quest HD
Channels 32, single reference
Bit Depth 24-bit
Resolution 0.022 μV/bit
Sample Rate 7.5 ksps
Bandwidth DC to 2kHz
CMMR 110 dB
Inferred Noise <1 µVrms at 7.5 ksps
Input Range Min ± 0.1875 V at a gain of 24
Input Range Max ± 2 V at a gain of 1
Input Impedance 1 Gohm, 20 pF

The Quest HD and Quest HD + Stim processors are ideally suited for Brain Computer Interface and real time feedback applications. At merely 700 grams, the Quest provides a light weight and portable form factor. A unique active front end, multiple analog and digital inputs and outputs and extremely low latency processing ensure Quest is well suited for your challenging research environments.

Matlab and Python APIs are included with the Quest systems and provide full control over recording, data processing, trigger output and stimulation. Python “code on the box” can be added for the fastest and most streamlined real time data processing. The Quest’s input and output capabilities can be completely utilized by the API ensuring you can utilize the full feature of the Quest for your Brain-Computer Interface applications. Our unique Active Front End design results in unparalleled signal fidelity, a key requirement for many single trial Brain Computer Interface applications.

The Quest HD + Stim adds an entirely new dimension to real time feedback, allowing closed loop feedback control of transcranial electrical stimulation. With custom programed stimulation patterns and intensities, initiated with custom programed data processing the possibilities are endless.

Highlights

  • A completely wearable EEG/ERP solution
  • Wired, WiFi or self-contained recording
  • Optimized real-time data transfer
  • Python code runs on the on-board processor
  • Matlab and Python APIs for custom applications
  • Unique Active Front End designMulti-modal recording and stimulation options
  • Up to 56 Analog and 40 Digital IO channels

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