Ground electrode with fixed connecting cable

These ground electrodes are made of a copper strip covered in an absorbent felt. The electrodes must be placed in saline solution before use.
It is also possible to use them with a contact gel.
After use, these electrodes should be carefully rinsed with clear water to wash the substances containing salt out of the felt. This will increase the serviceable life of the electrodes.
The connecting cable to the preliminary amplifier has a fixed connection with the copper strip and cannot be varied in length.