Electrolyte Formulations - Geodesic Sensor Net Technical Manual

10: Net FAQs
• Die-cut structure : The die-cut geodesic structure provides a closer head fit than
the GSN 200. This snugger fit makes it even more important that the subject
keep his or her eyes closed as instructed.
The tighter web structure also makes it more challenging to achieve an evenly
spaced application. We recommend that you practice applying a "dry" Net (one
without electrolyte) to a colleague repeatedly.

Electrolyte Formulations

Is NaCl good for mixing HydroCel Saline
electrolyte?
In casual testing, EGI did not find any evidence for differences in offset or drift
between sodium chloride (NaCl) or potassium chloride (KCl). However, because
NaCl electrolyte is not vigorously tested, EGI does not recommend it for use with the
Net.
Is distilled water essential for mixing electrolyte?
EGI has used tap water for making electrolyte without any noticeable problems.
However, tap water has a huge range of possible contaminant and ion concentrations,
even within a single city's supply. Be aware that you may encounter problems if you
do not use distilled water.
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Geodesic Sensor Net Technical Manual
S-MAN-200-GSNR-001 • January 31, 2007