C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/00 (2006.01) B01D 35/14 (2006.01) B01D 35/143 (2006.01) G01N 21/78 (2006.01) G01N 33/18 (2006.01)
Patent
CA 2487010
A filtering device for a gravity-flow liquid treatment system includes a first filter component that can be either exposed or adjacent to a substantially transparent region in at least a portion of a filter housing. The first filter component is capable of providing a visual indication of exposure to at least one contaminant. The contaminants for which the first filter component can indicate exposure include particles, inorganic, and organic contamination. Particle contamination is indicated by a change in color of the first filter component through particle collection. Inorganic and organic contaminants are indicated by reaction with at least one agent capable of undergoing a color-change reaction in response to at least one contaminant. Water treatment systems and filtration devices that include at least one agent capable of undergoing a color-change reaction and thus give a visual indication of exposure to at least one contaminant for use in both gravity-driven and pressure-driven environments are also described. 29
Joyce Patrick C.
Lynch Toni L.
Rinker Edward B.
Riches Mckenzie & Herbert Llp
The Clorox Company
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