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The industry standard for most
EEG and
EMG needle electrodes,
surface electrodes, and alligator clips is the 1.5mm “touch-proof safety socket.” Such sockets can be plugged into almost any modern EEG, ERG, or EMG machine. Technically, these 1.5 mm touchproof connectors fall under the DIN 42802-1 standard (under IEC 60601-1; sometimes written as DIN 42 802), which was adopted over 20 years ago to make electrodes safer. There are no longer any exposed metal pins; all metal components are recessed within plastic housings to minimize the risk of electrical shock. 1.5mm is the diameter of the recessed metal pin inside the EMG or EEG machine’s receptacle. The actual outer diameters of the plastic electrode plugs (and the corresponding receptacle in your machine) are typically just over 4mm. The recessed pin on the machine is the “male” half of the connection, and the touch-proof safety socket on the electrode is “female,” although it has the appearance of a plastic pin
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