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History of Science Museum

Ammeter, by Elliott Brothers, 1941

Inventory Number 12820


Acknowledgement: © History of Science Museum, University of Oxford, inv.12820

Item type
Object
Provenance
Presented by the Marconi Corporation in 2003.
Primary inscriptions
'AMMETER D. C. 2 1/2" / 5mA.No 2/ MOVING COIL / F.G. x 4 / 1941 / W [arrow] D NoD176178 / R= 15 [omega]'
Physical material
Glass
Plastic
Metal
Object type
Electronic instrument
Dimensions
Diameter: 63mm Depth: 55mm Weight: 0.15kg
Inventory No
12820
Accession Number
2003-11

Description

Ammeters are used to measure the current in a circuit. This Ammeter is black plastic with a dial that reads from 0 to 5. The resistance is 15 Ohms. The War Department broad arrow symbol is common on instruments supplied for military use.