Fluid handling – Ambient condition change responsive – For controlling soil irrigation
Patent
1984-08-30
1987-04-14
Chambers, A. Michael
Fluid handling
Ambient condition change responsive
For controlling soil irrigation
13762411, 340604, 361178, 361196, 239 64, A01G 2516
Patent
active
046570390
ABSTRACT:
A moisture sensor having an oscillator circuit with its output frequency directly proportional to moisture percentage present in the substance of interest. The oscillator circuit includes two spaced plates in the substance and functioning as a capacitor. The frequency of the oscillations changes as the capacitance between the plates changes due to the moisture present between the plates. The sensor is particularly adapted for use as a soil moisture detector and provides indications of wet or dry conditions.
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Bireley Richard L.
Iltis Rumult
Alexander Ranya L.
Chambers A. Michael
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