Technology
active gel
passive gel
saltwater sponge
active dry
Target impedance
25 kOhm
5-10 kOhm
60-100 kOhm
<2.500 kOhm
Recommended bandwidth
limited by amplifier
limied by amplifier
DC-100 Hz
0.5 - 45 Hz
Max. channels
up to 160
(64 wearable)
up to 256
(LiveCap to 64)
up to 160
(64 wearable)
up to 32
Preparation time
~5-10 minutes for 32 channels
~25 min. for 32 channels
< 5 min. for 32 channels
< 5 min. for 32 channels
Recording duration
up to 12 h
up to 12 h
60 - 90 min.
30 - 60 min.
Post-recording residuals
minor residual
major residuals
slightly moist hair
no residuals
Comfort for participants*
high
good
very high
good
Robustness to motion artifacts
very high
high
medium
medium
Possible simultaneaous recordings
TMS, fNIRS, tACS
BrainCap only: TMS, fNIRS, fMRI, MEG, tDCS, tACS
fMRI
Flexibility for multiple head sizes**
exchangeable cap sizes
ficed cap size
fixed cap size
fits head sizes 52 -62