Ag/AgCl electrode

Also called: Silver/silver chloride electrode

Ag/AgCl electrode — An ECG electrode whose sensor is silver coated with silver chloride, giving a stable, low-noise skin contact for recording heart signals.

The silver chloride layer lets the electrode convert ionic current in the skin and gel into electronic current in the lead wire with low offset and drift. It also helps the electrode recover after defibrillation, which is why Ag/AgCl is the standard for monitoring and diagnostic ECG.

Performance requirements for disposable electrodes, including offset, impedance and defibrillation recovery, are set out in ANSI/AAMI EC12.

Related termsANSI/AAMI EC12

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