Lindemann electrometer

Lindemann electrometer

[′lin·də·mən ‚ē‚lek′träm·əd·ər]
(electricity)
A variant of the quadrant electrometer, designed for portability and insensitivity to changes in position, in which the quadrants are two sets of plates about 6 millimeters apart, mounted on insulating quartz pillars; a needle rotates about a taut silvered quartz suspension toward the oppositely charged plates when voltage is applied to it, and its movement is observed through a microscope.