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Creator: UoD_Museums on 17 Sep 2011, 5:26 p.m.

Ammeters are insteruments which measure the flow of electric current. This model was created by Professors William Edward Ayrton (1847–1908) and John Perry (1850–1920). They devised their first model, the Permanent Magnet Ammeter, in 1880, followed by the Magnifying Spring Ammeter in 1883, which was also the year that University College, Dundee opened and would have begun acquiring scientific equipment.

Ayrton and Perry met in Japan and were working at the City and Guilds Technical College (now part of Imperial College London) when the ammeter was developed. Advances in ammeter design at the time reflected the growth in high voltage uses of electricity, advocated by Ayrton himself.