Peltier Type Electrometer, 1848
1845
Thompson quadrant electrometer by J. White of Glasgow
Lindemann electrometer
1930-1950
Lindemann electrometer
Harris's balance electrometer, 1840-74.
1840-1874
Discharging electrometer of unusual form
Henley's quadrant electrometer
Quadrant electrometer
1828-1857
Thomson's Portable Electrometer, 1867-1888
1867-1888
Kelvin quadrant electrometer no. 99
1867-1896
Kelvin Quadrant Electrometer, 1866
1866
Wulf electrometer by Gunther and Tegetmeyer of Braunschweig
Kelvin quadrant electrometer in use until 28th May 1955
1955
Clockwork & drum
Farmer electrometer
1960
Electrometer, modified Henley pith-ball type
Vibrating reed electrometer by Ekco Electronics Ltd England
1957-1963
Personnel monitoring system consisting of electrometer made by Baldwin Instrument Co. Ltd
1955-1960
Kelvin (White) quadrant electrometer (No.71)
1885
Quadrant Electrometer
1867-1900
Sir W. Thomsons portable electrometer
1867-1876