Monitoring method
US9134264B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2012 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Nov 5, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for monitoring the effectiveness of an ion exchange module in an ultrapure water purification circuit containing ultrapurified water and having a purified water inlet and a point of use outlet and a memory, the method including the steps of measuring the resistivity of ultrapurified water using one or more sensors to provide an ultrapurified benchmark resistivity value Ri; introducing purified water into the circuit and passing the water through the ion exchange module; measuring the resistivity of the water to provide a new water resistivity value Rnew; and comparing Ri and Rnew to determine the effectiveness of the ion exchange module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.