Compact portable digital multimeter for instantaneous measuring

Details Compact portable digital multimeter for instantaneous measuring Compact portable digital multimeter for instantaneous measuring

1980-10-10

1982-11-02

Ciarlante, Anthony V.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

73432HA, G01C 504

Patent

active

043566391

ABSTRACT:
A device for measuring height despite difficult visibility comprises a small portable water tank positioned at the location to be measured and a pressure transducer placed at a reference location and connected with the water tank by a hose, whereby the transducer outputs a signal voltage proportional to hydrostatic pressure and hence to the height of the first location. The output signal is amplified and converted to a digital value which is displayed by a digital display calibrated in terms of height.

REFERENCES:
patent: 2557021 (1951-06-01), Williams
patent: 3048927 (1962-08-01), Maloof
patent: 3815423 (1974-06-01), Gearhart
patent: 4145817 (1979-03-01), Ager
Crumrine, K. C., et al., Hydrostatic Level for Elevation Surveying, Geophysics, vol. XVI, No. 3, Jul. 1951, pp. 486-493.

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