Disposable irrigation gauge

Details Disposable irrigation gauge Disposable irrigation gauge

1981-07-23

1983-11-01

Ruehl, Charles A.

Measuring and testing

Moisture content or absorption characteristic of material

116227, 116321, G01F 2302

Patent

active

044124473

ABSTRACT:
An inverted tube closely fits a supporting cup and contains a column of water. A substantially annular or ring-like space is formed between the cup and the tube. Water is fed to the annular space through a lateral opening in the tube, the upper edge of the opening being located just below the level of the cup rim. As water evaporates from the exposed ring of water, it is replaced by the inverted column, air being admitted through the tube opening. Evaporation and transpiration causes reduction of the water level thus to indicate the amount of moisture loss from the surrounding soil.

REFERENCES:
patent: 1330995 (1920-02-01), Wyman
patent: 1851278 (1932-03-01), Hearn
patent: 2878671 (1959-03-01), Prosser et al.
patent: 3048032 (1962-08-01), Winter
patent: 3443420 (1969-05-01), McMahan
patent: 3926143 (1975-12-01), Hothan
patent: 4055991 (1977-11-01), Bridwell

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