Current flow meter
1850
High speed impeller current meter
1960-1970
Current meter Mk V by Ott
1980-1990
Impeller current meter marked Neyrpic
1960-1970
Valeport current meter
1970-1979
Nile control vertical axis current meter
1965
Watts Mk IV 'acoustic' current meter
1958
Main part of Revy's Water Current Meter
Ekman Current Meter by Ljungmann
1910
CID current meter (not in working order) by CID Ltd
1984
Part of Revy Current Meter
Watts helix current meter in box with accessories by Hilger & Watts Ltd
1948-1960
Helix current meter by Hilger & Watts Ltd
1960-1965
Recording directional current meter
1950-1960
Roberts radio current meter no 117 by Kelvin and Hughes
1970-1975
Delft current meter with gimbal arrangement
1980-1985