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RE: Chlorine electrodes

Rob Baur — Mon, 02 Jul 2007 13:11:59 GMT

Do you have ammonia in the sample?

RE: Chlorine electrodes

LRBSA — Mon, 25 Jun 2007 12:03:30 GMT

We chlorinate with sodium hypochlorite and dechlorinate with sodium bisulfite. We monitor both location with in-situ ProMinent Dulcometer chlorine residual probes. Readings are fed backe to a PLC as part of a compound control loop to regulate chemical feed. Have been using them since 2003 and have worked fairly well. We didn't want analyzers with chemical reagents to minimize maintenance. We check calibration weekly which is a fairly simple procedure. Change membranes and electrolyte in probes every 6 months or so. Residual readings vary slightly when compared to wet analysis but we have found that the accuracy is satisfactory for our process control needs.

RE: Chlorine electrodes

Rob Baur — Tue, 15 May 2007 18:50:00 GMT

By definition total chlorine is the measure of what oxidized KI to I2 at pH 4. Steer clear of any chemical free electrode, it may be able to measure free chlorine, but you need KI and pH4 to measure total chlorine.

RE: Chlorine electrodes

SueKrueger — Tue, 15 May 2007 14:45:07 GMT

We had Wallace and Tiernan chlorine analyzers. They never worked well - our chlorine residual was never consistant. Calibration was difficult, the analyzers were not user friendly. Maintainance on the probes was a nightmare. We have since taken the analyzers out of service, switched from gas to sodium hypo, and manually make our adjustments. Much easier!

Chlorine electrodes

01800469 — Tue, 15 May 2007 12:37:48 GMT

Has anyone used a chlorine electrode to control their chlorinator. If you have what brand and how well did it work.