What a great idea. This is not commonly done, as most oxide chemistry is reasonably stable to changes in concentration, and further, the concentration changes are usually small, presuming low drag out. However, using ORP to monitor/control the Chlorate content, is obvious, and should be a slam dunk. The alkaline component is also an obvious shot for control by conductivity. Conductivity is real good for control of solutions with a low alkalinity, but not so low that the pH is below 12. Oxide chemistry is perfect for this. Rosemount Analytical makes a good conductivity controller, they are based in Irvine California. Rudy Sedlak RD Chemical Company *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************