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EEG (Electroencephalography)
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Microvolt level (±100–500 µV, up to a few mV)
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Nanoampere level (≈ 0 mA, passive sensing)
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Very low noise, high shielding, stable contact, low contact resistance
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ECG / EKG (Electrocardiography)
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Millivolt level (≈ 0.5–4 mV)
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Microampere level (patient leakage current < 10 µA)
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Reliable medical-grade contact, corrosion-resistant, low contact resistance
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TENS (Transcutaneous Electrical Nerve Stimulation)
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Typically 20–80 V peak (some devices up to ~100 V)
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Typically 5–80 mA (limited for patient safety)
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Must safely carry mA-level pulse current, good conductivity, strong mechanical strength
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EMS / Massage Device
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Typically 30–60 V peak
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Typically 10–80 mA
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Similar to TENS; requires stable snap connection, flexible cable, safe current capability
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