Ferranti type V2015 ammeter
Siemens electro-dynamometer-ammeter
1882
Ferranti Ammeter
1920-1950
tong-test clip on ammeter
circa 1950
Model 401 Thermo-Ammeter
Holden's hot wire ammeter
1900-1903
Ferranti ammeter
Ayrton and Perry spring ammeter
1883-1894
Siemens Brothers
Thermocouple ammeter
1937
The British Westinghouse Company ammeter
moving coil milliameter
circa 1942
Sangamo Weston Ltd ammeter
Direct Coil Recording Ammeter
1930-1950
electro-magnetic current meter
1910
Hot-wire ammeter
1931
Ammeter by Schuckert
Ferranti ammeter
Ferranti Ammeter
1940-1960
Duddell's Patent thermo-ammeter
Moving coil milliammeter
RF Ammeter: spare for 2LO transmitter (9)
Ferranti ammeter.
Voltmeter and ammeter indicating the direct pull of a solenoid and tubular core
Watson Multi-range milliammete
Ferranti ammeter
Ferranti type AA25 ammeter
circa 1974
Ammeter, 5A, in mahogany case
1900-1959
RF Ammeter: spare for 2LO transmitter (7)
Microammeter with combined lamp and scale
1960
Weston thermoammeter
Moving Coil Ammeter
1884-1890
DC ammeter, as used at RAE.
Steelyard ammeter, 1885
1885
Polarised iron ammeter
Hot wire ammeter
Ammeter, moving iron
7-range clip-on ammeter
Crompton multi-range milli-ammeter
moving coil ammeter
1910
Ferranti Milliammeter
1930-1950
Ferranti Ammeter
1950-1960
Hot wire ammeter
Dynamometer ammeter
1914
Ayrton and Perry direct reading spring ammeter
Edelmann moving magnet milli-ammeter with pointer and key mounted in lid
circa 1897
polarized iron ammeter
circa 1888
Moving magnet milliammeter
1900-1920
