What is the difference between Flow2 and the DevKit?
01 Aug 2024
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What is the difference between Flow2 and the DevKit?
Updated on 01 Aug 2024
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Flow2 is our production-grade TD-fNIRS system. Flow2 is designed to give whole-head coverage for most wearers, with 40 module locations. The DevKit uses the same modules and base technology but provides the ability to tailor the hardware setup precisely to your experimental needs by employing a soft cap design. See the below specifications table for comparison of various features.
NOTE:
The DevKit shipment arrives with the 12 modules and 6 EEG electrodes pre-assembled in a soft cap as a reference design. The modules and electrodes can easily be removed for setup in a cap of your own design.
DevKit System
Flow2 System
fNIRS Type
Time Domain
Optode Style
Modular
Max number of modules
12
40
Number of Sources
36
120
Number of Time-Resolved Detectors
72
240
Number of Channels (Source-Detector Pairs)
216
>3500
Channel Length (Source-Detector Separation)
8.5mm to 27mm
10mm to 60mm
Source Types
Dual wavelength (690nm/905nm) Laser diodes
Laser Classification
Class 1 (FLPPS 21CFR1040.10)
Detector Type
Custom Silicon Detector
Dynamic Range
> 100dB
Sampling Rate
3.7hz
Number of Dry Active EEG Electrodes
6 + Reference & Bias
4 + Reference & Bias
EEG Sampling Rate
1 kHz
Headgear
Custom - Defined by customer. System ships with a soft cap
Fits heads of 52cm - 62cm Circumference and 32cm - 37cm Bitragion Coronal Arc
Power Supply
USB-PD (Delivered over USB-C)
Power Consumption
15W Max
50W Max
Data Transfer
USB 2.0
Data Storage
Data streamed to acquisition PC at rate of 300MB/min of recording
Data streamed to acquisition PC at rate of ~60 GB/hour of recording
Output File Formats
SNIRF
Output Metrics
Oxy/Deoxy/Total Hb per Channel
Total counts, 1st and 2nd Moments per Channel
Absolute Bulk Tissue Oxygenation per Channel (long within module channels only)
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