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LIQUID QUALITY CHECKING DEVICE AND LIQUID STORAGE TANK PROVIDED WITH THE DEVICE

  • US 20130312497A1
  • Filed: 02/06/2012
  • Published: 11/28/2013
  • Est. Priority Date: 02/18/2011
  • Status: Active Grant
First Claim
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1. A liquid quality checking device comprising:

  • an observation window that is attachable onto a liquid storage tank and extends in a vertical direction in which a liquid level of a liquid stored in the liquid storage tank changes, the observation window permitting a change in quality of the liquid to be observed as a change in color of the liquid; and

    first and second benchmark sections that are placed close to the observation window and each have a plurality of color samples corresponding to a plurality of different quality degrees of the liquid and arranged along the observation window;

    whereinin the first benchmark section, the color samples are arranged along the observation window in order of specific stages through which deterioration of the liquid quality progresses, andin the second benchmark section, the color samples are arranged along the observation window in order reverse to the order of the color samples of the first benchmark section.

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