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Portable liquid level detector

  • US 7,091,868 B2
  • Filed: 08/04/2003
  • Issued: 08/15/2006
  • Est. Priority Date: 12/28/2001
  • Status: Expired due to Term
First Claim
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1. A method of detecting a clog jammed in a pipe, comprising:

  • moving a capacitive proximity switch along the length of a pipe wherein a pipe is jammed at an unknown location so as to sense whether a capacitance within a pipe is changed; and

    outputting an alarm signal to inform the location of the clog in the pipe when the capacitance has changed.

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