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Car wash chemical solution level monitoring system

  • US 9,389,114 B2
  • Filed: 06/04/2014
  • Issued: 07/12/2016
  • Est. Priority Date: 06/26/2013
  • Status: Active Grant
First Claim
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1. A chemical solution liquid level probe for measuring the level of a chemical solution stored in storage containers located in a wet environment adjacent to an automated car wash, comprising:

  • an elongated drop in tube of a length able to reach a point adjacent the bottom of a container when inserted in a hole in a top of said container to thereby be supported by said tube with a section of said tube protruding above said top of said container, the bottom of each tube allowing entry of liquid in said associated container into said tube so as to thereby fill the tube to the same level as existing in the associated container;

    a sealed water tight enclosure mounted to said protruding section of said tube to a top end of said tube, said enclosure containing a liquid level sensor mounted in said enclosure and arranged to emit sonic waves down into said tube and to sense the timing of return waves reflected from liquid in said tube corresponding to the liquid level in said container;

    an electronic processor in said sealed enclosure storing and analyzing said sensor signals to periodically calculate the level of liquid in said storage container from the timing of sensed return waves, and to determine malfunctions of said sensor;

    a wireless transmitter/receiver in said enclosure for transmitting data from the liquid level sensor to a remote signal storage analysis and display device;

    a battery power source in said sealed enclosure powering said sensor therein, said wireless transmitter/receiver, and said electronic processor.

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