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English: A Dumas Neyrpic water current meter with propeller, made in France. This horizontal-axis instrument is used for measuring water velocities between 0.2 and 2.4 metres/second. An array of these devices can be used for hydroelectric turbine flow measurements. A single device can be lowered on a wading rod and used to measure flow in a stream or an ocean current. The number of the revolutions of the propeller is proportional to water velocity and is counted electronically. This style of instrument has a cosine response to off-angle water currents.
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Author Wtshymanski

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9 March 2011

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Date/TimeThumbnailDimensionsUserComment
current12:32, 27 August 2011Thumbnail for version as of 12:32, 27 August 2011800 × 528 (78 KB)Gauravjuvekarerased portion remaining on bottom border left of the hand
12:30, 27 August 2011Thumbnail for version as of 12:30, 27 August 2011800 × 528 (76 KB)Gauravjuvekarwhitened small region remaining in top right corner
12:27, 27 August 2011Thumbnail for version as of 12:27, 27 August 20112,000 × 1,320 (482 KB)GauravjuvekarWhitened bckgrnd
17:11, 9 March 2011Thumbnail for version as of 17:11, 9 March 20112,048 × 1,536 (647 KB)Wtshymanski{{Information |Description ={{en|1=A Dumas Neyrpic water current meter with propller, made in France. This instrument is used for measuring water velocities between 0.2 and 2.4 metres/second. An array of these devices can be used for hydroelectric tur

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