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Contents

1953: Vol. XXX, No. 2

A Current Meter using a Phototube

Submitted
July 27, 2018
Published
2018-05-14

Abstract

To measure velocities of currents automatically, the author has made a recording current meter using a phototube, in which the intermittent photoelectric current is depicted on a chart of a recorder on deck. The speed and direction of water current can be measured respectively by the time intervals and by the intensity of photoelectric current. Experiments on the sea have shown that by using the current meter, the actual under-water conditions can be immediately observed, and fine, accurate and rapid observations of water current have been made possible.