ITS Patents

Industrial Test Systems has developed many unique chemistries. Being an innovator of water quality testing, we hold many patents in the United States and around the world. A list of our many Patents is below.


Patent Number Title
7491546 Reagent delivery and photometric chlorine analysis
Water soluble analytical agents for chlorine analysis of water are delivered into a sample from a support that is beneficially moved in the sample to assist delivery and mixing.
7333194 Photometric analysis
A beneficial photometric analytical method is described according to which an effective amount of at least one analytical agent for photometric analysis, is delivered from a support into a liquid sample, and advantageously a mixing action may be provided, by moving …
20060246596 Cyanide Application
This invention relates to colorimetric analysis based upon the Konig Reaction, in particular of cyanide.
6696300 Arsenic analysis
An improved method for the analysis of arsenic in an aqueous sample, is disclosed. In accordance with the inventive method, arsenic is reduced to arsine gas in an acidic aqueous reaction environment and in the presence of an effective amount of an agent f…
6541269 Colorimetric test strips (Aperture)
A method and calorimetric test strip for determining analyte concentration are provided. The test strip includes an aperture exposing a face of an calorimetric indicator-bearing carrier.
5620658 Colorimetric test strip
A novel immersible colorimetric test strip is provided. The test strip includes a flow through, colorimetric indicator-bearing carrier, and a substance separately carried on the test strip for chemically modifying analyte into a detectable ionic form
5491094 Test strip for free chlorine analysis
A colorimetric test strip useful for analysis of free chlorine is provided. In a preferred embodiment, 3,3′,5,5′-tetramethylbenzidine is the colorimetric indicator. Beneficially, the carrier for the indicator has been treated to have a pH that eliminates …
5106581 Test device for detection of molybdate, vanadate and ferric ions
Improved method and device for detection and semi-quantitative colorimetric determination of molybdate, ferric, and vanadate ions in aqueous solutions and coolant systems containing ethylene glycol and coolant additive.
9222891B1 Reflectometry apparatus and method
The present invention is directed to a reflectometer-based apparatus and method for colorimetric analysis. It includes use of a test strip provided with an aperture over which a translucent colorimetric, indicator-bearing matrix is affixed. The invention includes a test strip holder that includes a test strip holding channel provided with a white background.
EP 1725864 Photometric analysis (European Patent DE, FR and UK)
This invention relates to photometric analysis of liquids.
SA 2007/00628 Photometric analysis (South African)
This invention relates to photometric analysis of liquids.
4,833,889 For System for Water Analysis namely photometer and software
Smart Photometer System ®
4848211 For Waterproof wireless-enabled photometers for water analysis in class 9
Smart Digital Water Testing®