Kolbe electrometer, precision form of gold-leaf instrument. This has a light pivoted aluminum vane hanging next to a vertical metal plate. When charged the vane is repelled by the plate and hangs at an angle. An electrometer is an electrical instrument for measuring electric charge or electrical potential difference. OverviewAn electrometer is an instrument for measuring or electrical. There are many different types, ranging from historical handmade mechanical instruments to high-precision el. The gold-leaf electroscope was one of the instruments used to indicate electric charge. It is still used for science demonstrations but has been superseded in most applications by electronic measuring. A modern electrometer is a highly sensitive electronic whose is so high that the current flowing into it can be considered, for most practical purposes, to be zero. The actual value of input resistance f.
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