Free Chlorine Reagent Set

The reagent set includes powdered components that are mixed to create two liquid reagent solutions used in the analyzer’s automated measurement cycle. This chemistry enables precise, repeatable free chlorine readings for process control, regulatory monitoring, and disinfection optimization.

Key Features

• Reliable DPD chemistry - Uses the N, N-diethyl-p-phenylenediamine (DPD) method, a standard approach for chlorine analysis in municipal and industrial water monitoring.
• Long shelf life (powder form) - Powder reagents offer extended storage stability when kept in a cool, dark, dry environment.
• Consistent reagent preparation - Each kit mixes into two 500 mL aqueous reagent solutions for analyzer operation.

What’s Included

The Free Chlorine Reagent Set contains three powdered components:

• Free Chlorine Indicator
• Free Chlorine Buffer
• DPD Powder

These components are prepared according to the 3017M reagent preparation procedure to produce two reagent solutions used during the analyzer’s automated measurement cycle.

Shelf Life and Storage

Proper storage is critical for maintaining reagent integrity and measurement accuracy.

Component	Shelf Life (Powder Form)
Free Chlorine Indicator	Up to 5 years
Free Chlorine Buffer	Up to 5 years
DPD Powder	DPD Powder

 

Always check the expiration date on each individual component bottle. Store reagents in a cool, dry, and dark location to help maximize stability and shelf life.

Once hydrated and placed in the analyzer, reagent solutions are typically consumed over 1 month, depending on the analyzer’s measurement interval.

Compatible Instruments

This reagent set is specifically designed for:

• YSI 3017M Online DPD Chlorine Analyzer

The 3017M analyzer is part of YSI’s drinking water monitoring portfolio and works alongside our online sensors and analyzers designed for continuous drinking water process monitoring and control.