| 摘要 |
Apparatus is provided to measure changes in the elevation of a stream of fluid flowing in an open channel for use in computing the rate and/or quantity of fluid flow. The apparatus comprises a hollow cylindrical housing mounted by means of a bracket assembly to pivot on an axis transverse to the stream and an arm connected at one end of the housing and mounting at its other end a float which rides upon the surface of the fluid. The float and arm cause the housing to pivot in response to changes in elevation of the fluid, and a variable resistor fixedly mounted inside the housing cooperates with a pendulous mass mounted on the shaft of the resistor to produce an electrical signal when the housing pivots about the shaft and the mass. The signal from the resistor is fed into recording and computation instrumentation to yield the desired readout.
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