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Electrode Impedance Checker

The Electrode Impedance Checker is suitable for measuring electrode contact impedance for all surface biopotential measurements, including those for ECG, EEG, EGG, EMG, EOG, Bioimpedance and Impedance Cardiography. It allows simultaneous connection of up to three electrode leads, for quick impedance checking between any two electrodes in the three connected leads Active (Vin+), Reference (Vin-), and Ground (GND).
SKU: NS-7656
€423.85

The Electrode Impedance Checker is suitable for measuring electrode contact impedance for all surface biopotential measurements, including those for ECG, EEG, EGG, EMG, EOG, Bioimpedance and Impedance Cardiography. It allows simultaneous connection of up to three electrode leads, for quick impedance checking between any two electrodes in the three connected leads Active (Vin+), Reference (Vin-), and Ground (GND).

For best-performing biopotential measurements, the electrode lead impedance between any two electrode leads should be < 5 kΩ. Adequate biopotentials can be obtained with far higher electrode lead impedances, but measurements will be more subject to motion artifact and electrical noise contributions from the surrounding environment.

To obtain electrode lead to lead impedances of < 5 kΩ, it is usually required to slightly abrade the skin surface using a mildly abrasive cream/pad and then employ a well-gelled (not dry) surface electrode. If gel has dried on electrode, rejuvenate with a small amount of electrode gel on the contact pad of the electrode.

The appropriate LEDs (Green, Yellow, Orange and/or Red) will illuminate to indicate the measured electrode impedance. The Electrode Impedance Checker is only active when the Test button is pressed.

The Electrode Impedance Checker measures electrode impedance through the use of a very small, alternating, constant current. Because alternating current excitation is used, the confounding effects of the electrode/skin junction potentials are removed in order to obtain the most accurate measurement of electrode impedance.

Electrode Impedance Range Indicators: < 5  kΩ, 5-10 kΩ, 10-20 kΩ, 20-30 kΩ, 30-40 kΩ, 40-50 kΩ, > 50 kΩ

Lead Compatibility: Standard 1.5mm touch proof DIN electrode leads.

Testing Configurations – Switch Selectable: Active (Vin+) to Reference (Vin-), Active (Vin+) to Ground (GND), Reference (Vin-) to Ground (GND)

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