How to choose a residual chlorine online monitor?

The residual chlorine online monitor is widely used in circulating water automatic control dosing, swimming pool chlorination control and continuous monitoring and control of residual chlorine content in aqueous solutions in drinking water treatment plants, drinking water distribution networks, swimming pools, hospital wastewater, water quality treatment projects, etc.

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How do we choose a residual chlorine online monitor in actual situations? Let's understand several basic concepts together: Free chlorine - HClO and ClO- are generated in water, and the sum of HClO and ClO- is called "free chlorine"
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Among them, free chlorine has a strong killing effect on bacteria and other microorganisms, and is an effective anti-virus component in free chlorine, so HClO is also called "effective free chlorine"
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Combined chlorine - Before free chlorine plays a bactericidal effect, due to the dissolved ammonium ions and various impurities of organic matter in water, these impurities will first react with free chlorine and consume a part of free chlorine
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For example, free chlorine rapidly forms mono- and dichloramines with ammonium ions in solution
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Free chlorine also reacts with organic compounds, such as proteins and amino acids, over extended periods of time to form various organochlorine compounds
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Chloramines and organochlorine compounds together are called combined chlorine
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Total Chlorine - Combined chlorine plus free chlorine is the total amount of chlorine in the solution, called total chlorine
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Among these substances, only free chlorine is an effective disinfectant, and compound chlorine has almost no sterilization ability
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Only after the above chlorine consumption needs are met, will there be excess free chlorine to kill bacteria
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  The amount of chlorine added - the amount of chlorine added during chlorination disinfection is called the amount of chlorine added, and the amount of chlorine added should include two parts: chlorine demand and residual chlorine
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Chlorine demand refers to the amount of chlorine required to kill bacteria and oxidize organic and reducing substances
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  Residual chlorine amount - refers to the amount of chlorine remaining in the water to inhibit the re-growth of residual bacteria in the water, which is called residual chlorine or residual chlorine
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Some people call free chlorine residual chlorine, which is inaccurate.
The free chlorine remaining after killing bacteria is residual chlorine
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  The working principle of HD-YL680 residual chlorine online monitor is to apply a negative pulse with a specific voltage amplitude between the polarized electrode and the reference electrode to selectively select free chlorine to participate in the reaction, so that an electrochemical reaction occurs at the cathode of the electrode.
, so as to form a current signal proportional to the concentration of free chlorine, the meter calculates the concentration of free chlorine through the collection and analysis of the current signal
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  The residual chlorine online monitor is mainly used in the following places: (1) Automatic dosing of circulating water (2) chlorination control of swimming pools, drinking water treatment plants and drinking water distribution networks (3) swimming pools (4) hospital wastewater (5) water quality treatment projects Holder residual chlorine online monitor is an online intelligent residual chlorine detector produced by our company with the introduction of foreign technology.
It adopts imported components and permeable membrane heads, based on polarographic analysis technology and advanced production technology and surface mount technology
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The use of this series of analysis techniques ensures the stability, reliability and accuracy of the instrument's long-term work
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With Chinese/English menu operation, notepad to store measurement data, 485 communication and other functions
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