A digital electrometer.
electrometer definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- a device for detecting or measuring differences of potential by means of electrostatic forces
- an active circuit arrangement for measuring differences of potential without drawing appreciable current
electrometer definition by American Heritage Dictionary
An instrument for measuring voltage.