Irrigation control system

Details Irrigation control system Irrigation control system

1989-01-18

1990-06-19

Chambers, A. Michael

Fluid handling

Ambient condition change responsive

For controlling soil irrigation

13762412, 239 64, 239 70, F16K 1736

Patent

active

049344005

ABSTRACT:
An irrigation control system includes a soil moisture sensor (S) that controls the common lines of various irrigation valves (VA) being controlled by a conventional irrigation time based controller (TC). The sensor is in a first zone of primarily shallow rooted plants. A timer (TR) is activated whenever the soil moisture sensor allows the first zone to be watered. The timer (TR) increments a counter (CR) which closes after a pre-set number of irrigation cycles of the first zone having been completed. When the counter (CR) close contacts (C), then the irrigation valves feeding a second zone of primarily deep rooted plants are activated.

REFERENCES:
patent: 4545396 (1985-10-01), Miller et al.
patent: 4683904 (1987-08-01), Itis
patent: 4695419 (1987-09-01), Weintraub et al.

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