Kahejuhielektrimõõtur kasutab plaatinaga kaetud ja paralleelselt paigaldatud kvartsniitide paari ja kui need on elektriliselt laetud, „kummarduvad“ nad väljapoole ja nende vahelise kauguse muutust saab täpselt mõõta.
Wulf electrometers use a pair of quartz threads covered in platinum and mounted parallel; when these are electrically charge, they “bow” outwards and the change in the distance between them can be accurately measured.
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