Portable tensiometer for soil moisture measurement

Details Portable tensiometer for soil moisture measurement Portable tensiometer for soil moisture measurement

1976-09-20

1978-01-17

Myracle, Jerry W.

Measuring and testing

Moisture content or absorption characteristic of material

G01N 2556

Patent

active

040685250

ABSTRACT:
A portable tensiometer for measuring the moisture content of soil, including an elongated housing tube having a hollow porous tip mounted thereon for insertion in the soil, and a hollow handle element having a vacuum gauge secured to one end and a cylinder defining a chamber of adjustable volume at the other end. Capillary tubing, which connects the interior of the porous tip to the adjustable-volume chamber and to the vacuum gauge to form a sealed, normally water-filled system, and the use of a minimal volume of water in the instrument minimizes errors due to changes in temperature to which the instrument is subjected.

REFERENCES:
patent: 2023490 (1935-12-01), Richards
patent: 3939699 (1976-02-01), McCormick
patent: 3961753 (1976-06-01), Sears

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