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