Soil moisture sensing apparatus for preventing overwatering

Fluid handling – Ambient condition change responsive – For controlling soil irrigation

Reexamination Certificate

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C073S073000, C239S063000

Reexamination Certificate

active

07997294

ABSTRACT:
A soil moisture sensing system includes a housing embedded in the soil and having a water chamber adapted to receive water from a water source. A controlled drainage assembly includes a semi-permeable membrane coupled to said water chamber for controllably releasing water from the water chamber. A magnetically actuated switch is coupled to a float in the water chamber to provide a control signal when the water level in the water chamber is at a predetermined level.

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