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Chlorine Analyzers

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Online Chlorine Water Analysis – Consistent Results, Reliable Quality & Instruments You Can Trust

Hach ® online analyzers (sometimes called inline or process analyzers), have long been industry standards in water quality management for municipal drinking water, wastewater and industrial applications.

Known for accurate and reliable measurement, Hach®'s Chlorine Analyzers offer real-time results you can count on. With a variety of options to choose from – amperometric or colorimetric chlorine analyzers, free chlorine analyzers, total chlorine analyzers, chlorine monitoring systems, disinfection panels and more – Hach has the analyzer you need for your unique disinfection application. The industry standard Hach CL17sc Chlorine Analyzer uses colorimetric DPD chemistry to monitor water for free or total chlorine. Also suitable for permanganate residual measurements.

Improve treatment processes, avoid downtime, ensure compliance and control manufacturing operations.

CL17sc Colorimetric Chlorine Analyzer

CL17sc Colorimetric Chlorine Analyzer

The CL17sc is the industry standard for monitoring of free or total chlorine. Built on a legacy of reliability in online chlorine analysis, the advanced design of the CL17sc reduces routine maintenance touch time and provides powerful diagnostic features and enhanced connectivity. The result is less hassle, minimized risk of data loss, and even more reliable information to empower your decision making.

Applications:

RO Membrane breakthrough, Drinking Water, Disinfection

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CL10sc Amperometric Free Chlorine Sensor

CL10sc Amperometric Free Chlorine Sensor

The CL10sc Free Chlorine Analyzer measures free chlorine continuously for real time process control. It is based on amperometric technology and is fully compatible with all of Hach's digital controllers. The CLF10 sc can be used in most municipal and industrial applications and is best utilized where waste stream management is a constraint. This analyzer is equipped with a pH sensor for use with the unique Cal Watch advanced diagnostic feature.

Applications:

Discharge, Groundwater, Influent for Wastewater, Membrane Protection, Municipal Water, Regulations, Surface Water

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RMC Disinfection Panel

RMC Disinfection Panel

For Offsite Calibrations/Verifications & Adjustments

The RMC Disinfection Panel allows you convenient real-time control and calibrations from your office. No need to travel on site, you can make your adjustments very conveniently from your desktop. Extremely reliable and time-saving, equipped with two high performing chlorine analyzers, easy to use plug-and-play controller and latest remote connectivity.

  • High-performing remote calibrations
  • Peace of mind thanks to continuously validated measurement
  • Complete solution from one single-source supplier
  • Increased flexibility and easy-to-use features

Applications: Drinking Water Distribution Network

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CL17sc Colorimetric Chlorine Analyzer

Ultra Low Range CL17sc Colorimetric Chlorine Analyzer

ULR CL17sc offers unparalleled accuracy, facilitating more precise treatment decisions. Using colorimetric DPD chemistry, it continuously monitors water for free or total chlorine, while ensuring compliance. With an operational capability of 30 days unattended and straightforward monthly maintenance procedures, including reagent changes and cell cleaning, this analyzer minimizes downtime and optimizes workflow efficiency. Its robust diagnostic features, including a built-in flow meter, status lights, and on-screen diagnostics menu, simplify troubleshooting and prevent operational disruptions.

Applications:
Boiler Water , Discharge , Filtration, Groundwater,
Membrane Protection, Municipal Water, Potable Water
Pre-Treatment, Product Loss, Surface Water

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Frequently Asked Questions

What is the difference between colorimetric and amperometric chlorine analyzers?

Chlorine can be measured colorimetrically using the N,N-diethyl-p-phenylenediamine (DPD) chemistry.  Chlorine oxidizes DPD to produce a magenta colored dye.  The intensity of the magenta color is directly proportional to the concentration of chlorine in the sample.  The color is determined photometrically by shining a specific wavelength of light through the colored sample and measuring the amount of light absorbed.

Chlorine may also be measured amperometrically.  Amperometry is an electrochemical technique that measures the change in electrical current resulting from chemical reactions taking place at the electrodes as a function of the analyte concentration.  A typical amperometric sensor consists of two dissimilar electrodes – an anode and a cathode.  In an amperometric chorine measurement the sensor measures the reduction of chlorine at the cathode and the oxidation of the anode.

What chlorine method is recommended for ultra low range (ULR) samples (less than 0.05 mg/L chlorine)?

Hach offers two laboratory methods that can measure ultra-low range (ULR) chlorine concentrations:

Amperometric Titration - the TitraLab®AT1000, can be used to measure as low as 3 µg/L.
ULR DPD Chlorine - a spectrophotometer such as the DR1900, 3900 or 6000 can be used to conduct DPD Ultra Low Range method 10014 (wastewater) or method 8370 (drinking water) which can measure as low as 2 µg/L. These methods use a pour-thru cell, filter and liquid reagents.