Electrometer for measuring the static charge on carpet - has its probe electrode formed as a circuit capacitor

摘要

Only a small part of the potential picked up by the probe electrode is applied to the electrometer. The reduction is made by a capacitive potential divider. One capacitor of the potential divider consists of the probe electrode itself, which is made by enclosing the insulated central conductor of a co-axial cable in a metal tube. The metal is pref. stainless steel, and the insulator PTFE.