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Disposable electromagnetic fluid level sensor

  • US 5,789,675 A
  • Filed: 08/04/1995
  • Issued: 08/04/1998
  • Est. Priority Date: 08/04/1995
  • Status: Expired due to Term
First Claim
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1. A fluid level sensor for use in detecting the existence of fluid at a predetermined location in a container having sidewalls, said sensor comprising:

  • an electromagnetic sensor means disposable at a predetermined location on a sidewall of the container for developing a electromagnetic level detection signal for transmission into the container and for receiving reflected electromagnetic signals therefrom, the electromagnetic sensor means comprising an antenna;

    power supply means for supplying electrical current to said electromagnetic sensor means;

    attaching means coupled to the sensor means for holding the sensor means at the predetermined location along the sidewall of the container such that the antenna is attachable to the sidewall of the container at the predetermined location;

    a processing means coupled to the electromagnetic sensor means for processing electromagnetic signals received by the electromagnetic sensor means so as to determine whether fluid is present at the predetermined location, and for selectively developing a signal responsive to the signals received from the electromagnetic sensor means; and

    indication means for developing a human perceptible signal responsive to signals received from the processing means.

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