Rain-activated sprinkler shut-off system

Details Rain-activated sprinkler shut-off system Rain-activated sprinkler shut-off system

1990-09-28

1992-02-11

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324693, 324694, 340602, G01R 2702

Patent

active

050878867

ABSTRACT:
A moisture detecting system employs a body of porous concrete with electrodes embedded therein. The body of concrete is contained within a housing having an opening in the top thereof to admit rain. The body may also have electrical probes therein connected to the electrodes, which probes can be embedded in the ground to detect moisture therein.

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patent: 4853614 (1989-08-01), Carver
patent: 4942354 (1990-07-01), Miller

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