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Application Guide
AG/AI–024_4
Raw
Water
In
The illustration above shows a simple demineralisation
plant where anions are exchanged with hydroxyl ions
and cations are exchanged with hydrogen ions
Cation Bed
Reduction of
positively
charged
dissolved
solids
Sample
to
sodium
Monitor
in Water Treatment Processes
Further reduction
of any remaining
concentrations of
both positively and
Anion
charged dissolved
Exchange
solids to produce pure
Bed
Reduction of
negatively
charged
dissolved
solids
Sample
to
sodium
Monitor
8037 Sodium Monitor
Typical Range: 0.1ppb to 10ppm
Normal sodium concentration: 100ppb
(dependent upon type of exchange and
raw water quality)
(by the use of ion exchange resins) to produce pure,
mineral-free water. ABB sodium monitors are used
for continuous monitoring of sodium in the process
water.
Sodium Monitoring
Mixed Bed
negatively
High Purity
Water Out
water
8037 Sodium Monitor
Typical Range: 0.01ppb to 1.0ppm
Normal sodium concentration: 1.0ppb
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Table of Contents
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Summary of Contents for ABB 8037
- Page 1 (by the use of ion exchange resins) to produce pure, plant where anions are exchanged with hydroxyl ions mineral-free water. ABB sodium monitors are used and cations are exchanged with hydrogen ions for continuous monitoring of sodium in the process...
- Page 2 Our patented calibration solution technique ensures thermal equilibrium. In addition, ABB offer greater security at a lower cost by having: • A worldwide network of companies and agents to ensure backup in most countries.
- Page 3 Sodium Monitoring in Water Treatment Processes AG/AI-024_4 Installation ABB Sodium monitors are normally located inside the Water Treatment Plant on a rack – preferably in an air-conditioned room. Samples are normally at ambient temperatures so sample cooling should not be necessary (even the polishing plant will be below 55°C).
- Page 4 Sodium Monitoring in Water Treatment Processes AG/AI-024_4 Process Description Basic Measurement/ Analysis Theory All on-line sodium monitors are based on the use of a sodium ion selective electrode and a reference electrode. The measurement is very similar to that of pH, with the electrode pair also responding to hydrogen ions and changes in sample temperature.
- Page 5 ABB has Sales & Customer Support The Company’s policy is one of continuous product improvement and the right is reserved to modify the expertise in over 100 countries worldwide information contained herein without notice. www.abb.com Printed in UK (12.03) © ABB 2003 ABB Limited ABB Inc.
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