Crompton 6" voltmeter no.179- c.1882, 0 - 300v.
circa 1882
8" dial
Alioth's spring controlled voltmeter reading 0 to 250 volts
Siemens torsion type Voltmeter
Lord Kelvin's paralleling voltmeter
Electrodynamic Voltmeter Type 47635/5 No 753360 made by H. W. Sullivan Ltd.
Kapp and Crompton alternating current voltmeter
Portable moving coil voltmeter
1902
Cardew hot-wire type Voltmeter no.E68
Millivoltmeter of moving coil type with shunt
Crompton 6" voltmeter no.10707 - c.1899, 0 - 150v.
Mather electrostatic voltmeter
1890-1910
Ayrton & Mather electrostatic gravity voltmeter by R.W. Paul
1893-1901
Moving coil voltmeter
1894
Elliott sector voltmeter 0-120V, serial No.1107651
Lahmeyer electrostatic voltmeter no. 116298
Eight inch dial
Standard voltmeter.
Direct reading two-range voltmeter
1900
Voltmeter graduated to 100 volts
1887
Portable movable coil recording voltmeter no.157294
Hot-wire voltmeter
1893
Crompton 8" voltmeter no.26725 - c.1910
Voltmeter
1885
Kelvin's patent multicellular Voltmeter no.501 by James White
Moving iron voltmeter manufactured by Everett
circa 1902
Self-recording voltmeter, by Richard Freres, 1892-1893
1892-1893
Laboratory standard a.c. and d.c. (electrodynamometer) voltmeter with 12 inch scale
1952
Vacuum Tube Voltmeter Type TF1041C No.53690/008
1962-1972
Cambridge thermionic voltmeter
1930
Pattern K unipivot millivoltmeter
1912
Scalamp electrostatic voltmeter with built-in lamp and scale
1950-1970
Silver voltmeter, for international ampere determination
1907-1930
Early Thermionic voltmeter (Cambridge Inst. Co.)
1925
Electrostatic voltmeter
1893-1920
"Unipivot" d.c. Millivoltmeter No. L374523 by the Cambridge Instrument Co. Ltd.
1958-1968
Universal voltmeter type 261 Serial No.116 made by Sapphire Research and Electronics Ltd
1955-1960
Polarised iron voltmeter
Portable standard multi-range moving coil voltmeter
Digital voltmeter type LM901 serial number 108293 by the Solartron Electronic Group
1960-1965
Valve millivoltmeter type 784
Moving-coil voltmeter
1943
Cardew's voltmeter, patent, no. 147 (Ediswan)
1890
Electrostatic voltmeter, no. 37
Hot-wire voltmeter
1895
Voltmeter, centre zero, scale 3-0-3V
Soames and Nalders patent Voltmeter
Marconi electronic voltmeter, type BD699A
Paterson & Cooper Ayrton & Pererry's voltmeter
1900