Sensors can dry out during long sessions (usually limited to ~3 hours).
The type of electrode you choose dictates your daily prep time and signal quality.
The gold standard for signal fidelity. These use conductive gel and often require skin abrasion for low impedance.
Highest data quality; trusted for clinical and peer-reviewed research. Cons: Longest setup and cleanup time (up to 60 minutes). Saline-Based: Uses felt pads soaked in saltwater.
This guide breaks down everything you need to know before you click "buy." 1. Choose Your Sensor Technology
Use "spiky" or "pin" designs to contact the scalp without any liquid.