Sensor for measuring moisture and salinity

Details Sensor for measuring moisture and salinity Sensor for measuring moisture and salinity

2008-05-21

2008-08-05

Dole, Timothy J (Department: 2831)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

C324S689000, C324S690000, C324S694000, C324S696000, C324S713000

Reexamination Certificate

active

07408364

ABSTRACT:
A sensor for measuring the moisture and salinity of a material is disclosed herein. The sensor preferably includes a soil moisture circuit, a soil salinity circuit and a probe structure. The soil moisture circuit includes a high frequency oscillator, a voltage meter and a reference capacitor. The soil salinity circuit includes a low frequency oscillator, a voltage meter and a reference resistor. A third voltage meter allows for voltage outputs to be measured to calculate soil moisture and soil salinity values.

REFERENCES:
patent: 3323047 (1967-05-01), Martin et al.
patent: 4540936 (1985-09-01), Walsh
patent: 5418466 (1995-05-01), Watson et al.
patent: 5445178 (1995-08-01), Feuer
patent: 5479104 (1995-12-01), Cambell
patent: 7042234 (2006-05-01), Buss
patent: 7129713 (2006-10-01), Katz

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