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FLUID MEASURING APPARATUS

  • US 20090167328A1
  • Filed: 12/17/2008
  • Published: 07/02/2009
  • Est. Priority Date: 12/28/2007
  • Status: Active Grant
First Claim
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1. A fluid measuring apparatus, comprising:

  • a collector, comprising a first cavity, a first inlet, and a first outlet, the first cavity comprising a first inner wall and a second inner wall;

    a first sensing circuit, comprising a first electrode disposed on the first inner wall and a second electrode disposed on the second inner wall; and

    a first electrochromic device, electrically connected to the first sensing circuit;

    wherein when the first sensing circuit is enabled, a color of the first electrochromic device changes if a concentration of a fluid flowing through and between the first electrode and the second electrode varies.

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