- a calibrated device used for measuring extremely low voltages.
Origin of electrometer
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for electrometer
The tar and his training have given way to the register, the gauge and the electrometer.Steam Steel and Electricity
James W. Steele
The amount of the charge which they carry may be measured by the electrometer.A History of Science, Volume 5(of 5)
Henry Smith Williams
So the learned Professor called in the aid of the electrometer.
And the electrometer was able to detect the presence of those one at a time.
In its simplest form the electrometer is called the "electroscope."
- an instrument for detecting or determining the magnitude of a potential difference or charge by the electrostatic forces between charged bodies
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012