Tensiometer for shallow or deep measurements including vadose zo

Details Tensiometer for shallow or deep measurements including vadose zo Tensiometer for shallow or deep measurements including vadose zo

1997-04-17

1999-08-24

Oen, William

Measuring and testing

Moisture content or absorption characteristic of material

G01L 502

Patent

active

059411210

ABSTRACT:
A two cell tensiometer is described in which water level in the lower cell is maintained at a relatively constant height, and in equilibrium with the water pressure of materials that surround the tensiometer. An isolated volume of air in the lower cell changes pressure proportionately to the changing water pressure of the materials that surround the tensiometer. The air pressure is measured remotely. The tensiometer can be used in drying as well as wetting cycles above and below the water table.

REFERENCES:
patent: 4548225 (1985-10-01), Busalacchi
patent: 4922945 (1990-05-01), Browne

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