Types and working principles of residual chlorine online analyzers

Water is an indispensable resource in our life, more important than food
.

In the past, people drank raw water directly, but now people's technology has developed, and pollution has become serious, and the water quality has naturally been affected
.

Some people found that raw water contains a lot of parasites and bacteria, so people use chlorine gas for disinfection, but too high chlorine content will also cause harm to the human body, and finally there is a residual chlorine online analyzer
.

Holder residual chlorine online analyzer is an online intelligent residual chlorine detector produced by our company introducing foreign technology.
It adopts imported components and permeable membrane heads, based on polarographic analysis technology and advanced production technology and surface mount technology
.

The use of this series of advanced analysis techniques ensures the stability, reliability and accuracy of the instrument's long-term work
.

With Chinese/English menu operation, notepad to store measurement data, 485 communication and other functions
.

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


The concept of free chlorine measurement - the existence of chlorine: 1.
Active free chlorine (free active chlorine) Active free chlorine (free active chlorine)
.

The hypochlorous acid molecule, HClO, is the most important part of the disinfection process
.

  2.
Total free chlorine (free chlorine, free residual chlorine) and total free chlorine (free chlorine, free residual chlorine) are commonly referred to as chlorine disinfectants, which are composed of chlorine in these ways: elemental chlorine gas molecule Cl2, hypochlorous acid Molecular HClO, hypochlorite ion ClO- (hypochlorite) 3.
Combined chlorine (chloramine) Combined chlorine (chloramine), a compound composed of chlorine and nitride (NH2, NH3, NH4+), this combined state of Chloride has no disinfecting activity
.

  4.
Total combined chlorine (total chlorine, total residual chlorine) Total combined chlorine (total chlorine, total residual chlorine) refers to the general term for free chlorine and combined chlorine
.

  The working principle of the residual chlorine online analyzer: Use 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, thereby forming The current signal proportional to the free chlorine concentration, the meter calculates the free chlorine concentration by collecting and analyzing the current signal
.