Knight, R. B. D. Division of Electrical Science, National Physical Laboratory, Teddington, Middlesex, United Kingdom.
- Analog Voltmeters
- Electronic Voltmeters
- Digital voltmeters
- Sampling voltmeters
- Very sensitive instruments
- Links to Primary Literature
- Additional Readings
An instrument for the measurement of the electric potential difference between two conductors. Many different kinds of instruments are available to suit different purposes. Voltages of the order of picovolts (10−12 V) to megavolts (106 V) can be measured. Frequencies from zero (dc) to many megahertz and accuracies in the range from a fraction of part per million (ppm) to a few percent may be covered. See also: Electrical units and standards; Voltage measurement
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