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Remote sensing of water levels in small-diameter wells



Remote sensing of water levels in small-diameter wells



Agricultural Engineering 59(10): 44-45



A sensing device for measuring water level changes which has been successfully used for 2 seasons in 1.3 cm i.d. piezometer tubes, installed at depths of 15.2-305 cm, is described and the transducer circuitry which controls a 26 V d.c. motor, for moving the sensor vertically, is given. The sensor is a weighted tube, housing 3 wires connected to separate electrodes extending below the tube; two of these are 4.8 mm longer than the third.

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Accession: 000734919

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