Electronic device for analyzing aqueous solutions

• US 8,852,514 B2
• Filed: 09/11/2013
• Issued: 10/07/2014
• Est. Priority Date: 08/08/2006
• Status: Active Grant

• Current Assignee: Hach Company (Veralto Corp.)
• Original Assignee: Hach Company (Veralto Corp.)
• Inventors: Morris, David Alexander Nathaniel, Swanson, Teresa Lynn
• Primary Examiner(s): Jarrett, Lore
• Application Number:
  US14/023,660
• Publication Number:
  US 20140010729A1
• Time in Patent Office: 391 Days
• Field of Search: 422/85
• US Class Current: 422/85
• CPC Class Codes: G01N 21/77 by observing the effect on a chemical indicator
• CPC Class Codes: G01N 21/78 producing a change of colour
• CPC Class Codes: G01N 31/00 Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
• CPC Class Codes: G01N 31/22 using chemical indicators G01N31/02 takes precedence
• CPC Class Codes: G01N 33/18 Water

Abstract

An electronic device for analyzing an aqueous solution may comprise a housing, one or more measurement circuits and a control circuit all arranged inside the housing. The housing may be configured to receive a test element. The one or more measurement circuits may be configured to produce one or more corresponding sets of measurement signals relating to an aqueous solution received on the test element. The control circuit may include a memory having instructions stored therein that are executable by the control circuit to process the one or more sets of measurement signals to determine one or more corresponding characteristics of the aqueous solution.

Claims

1. A test element for determining a characteristic of an aqueous solution, comprising:

an opaque substrate;

a first side of the opaque substrate comprising a non-reflective surface that is dark in color;

a test pad on the first side of the substrate comprising a reagent responsive in color to a characteristic of an aqueous solution; and

,

wherein the substrate substantially, uniformly covers the test pad.

2. The test element of claim 1, wherein the first side of the substrate is black in color.

3. The test element of claim 1, further comprising a plurality of test pads affixed to the first side of the opaque substrate, each test pad comprising a respective reagent responsive in color to a respective different characteristic of the aqueous solution, and the substrate substantially uniformly covers all the test pads.

4. The test element of claim 1, wherein the plurality of different characteristics of the aqueous solution include one or more of chlorine concentration, bromine concentration, pH level, alkalinity concentration, ammonia concentration, nitrite concentration, nitrate concentration, solution hardness, peracetic acid concentration, peroxide concentration and chloramine concentration.