Hach CN-66 Free & Total Chlorine Cl2 Water Test Kit 0-3.5 mg/L Cat 2231-01

Hach CN-66 Free & Total Chlorine Cl2 Water Test Kit 0-3.5 mg/L Cat 2231-01

The Hach CN-66 is a portable colorimetric test kit for measuring both free and total chlorine (Cl2) in water. Using a simple color comparator method, it allows field or lab personnel to obtain rapid chlorine readings across a range of 0 to 3.5 mg/L (ppm) without the need for instrumentation. This kit is catalog number 2231-01 and is complete with all original components.

Specifications & What's Included

• Model: Hach CN-66
• Catalog Number: 2231-01
• Measurement parameter: Free Chlorine and Total Chlorine (Cl2)
• Measurement range: 0–3.5 mg/L (ppm)
• Method: Colorimetric (color comparator wheel)
• Includes: all necessary reagent packets (DPD method)
• Includes: color comparator wheel/disc
• Includes: sample collection tubes (2 glass sample tubes with black comparator block)
• Includes: step-by-step instruction booklet
• Includes: original molded plastic carrying case

Applications

The Hach CN-66 is used for chlorine residual testing in drinking water treatment, swimming pools, cooling towers, wastewater effluent, and industrial process water. Water utilities, municipalities, and environmental technicians use kits like this to verify that disinfectant residuals are within regulatory or operational targets — whether checking compliance at a distribution system tap or performing routine process control at a treatment plant. The colorimetric DPD method it employs is a standard approach recognized by Standard Methods for the Examination of Water and Wastewater. Its self-contained, portable format makes it suitable for both field sampling and bench use.