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Moisture sensitive irrigation valve control

  • US 5,445,176 A
  • Filed: 03/04/1994
  • Issued: 08/29/1995
  • Est. Priority Date: 03/22/1993
  • Status: Expired due to Fees
First Claim
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1. For a ground irrigation system including a water valve operated by periodic energization, a device for controlling the valve comprising:

  • (a) a controller comprising;

    (1) means for selecting a moisture level threshold,(2) means for producing a first signal, the first signal corresponding to a selected moisture level threshold,(3) means for receiving a second signal, and(4) means, responsive to the second signal, for de-energizing the water valve;

    (b) a detector remotely spaced from the controller comprising;

    (1) sensor means for producing a third signal, the third signal corresponding to the moisture level of the ground,(2) means for receiving the first signal, and(3) means for comparing the first and third signals and for producing the second signal in response to the comparison showing a predetermined relationship between the first and third signals, and;

    (c) means for interconnecting the controller and detector to allow transfer therebetween of the first and second signals.

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