Introduction to the working principle and function of residual chlorine analyzer

Water is an indispensable resource in our life, even more important than food. In the past, people drank raw water directly, but now that people's technology has developed, pollution has become serious, and the water quality has naturally been affected. Some people found that raw water contained a large number of parasites and bacteria, so people changed to use lv gas for disinfection, but excessive chlorine content would also cause harm to the human body, and finally a residual chlorine analyzer appeared. The editor brings you the working principle and function of the residual chlorine analyzer. The residual chlorine analyzer consists of an electronic unit and a measuring unit (including a flow cell and a residual chlorine sensor). It adopts imported residual chlorine sensor, which has the characteristics of no calibration, no maintenance, high precision, small size and low power consumption. The display instrument has the function of slope correction, zero point correction, real-time display of measured value, automatic temperature compensation, and manual compensation of pH value. After the compensation calculation of the electrode signal, it is converted into a more accurate residual chlorine signal. The analog output signal corresponding to the measured value can be connected with various regulators to form a control system, such as two-position regulators, time proportional regulators, nonlinear regulators, PID regulators, etc. It has a wide range of applications and high compatibility. This product is widely used in drinking water treatment plants, drinking water distribution networks, swimming pools, cooling circulating water, water quality treatment projects and other industries that continuously monitor the residual chlorine content in aqueous solutions. The concept of residual chlorine measurement - the way chlorine exists: 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. Combined chlorine (chloramine) Combined chlorine (chloramine) is a compound formed by combining chlorine and nitrogen compounds (NH2, NH3, NH4+). Chloride in this combined state has no disinfectant effect. 3. Total free chlorine (free chlorine, free residual chlorine) Total free chlorine (free chlorine, free residual chlorine) is commonly referred to as chlorine disinfectants, which are composed of chlorine in these ways: elemental lv gas molecule Cl2, hypochlorine Acid molecule HClO, hypochlorite ion ClO- (hypochlorite) 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. Working principle of residual chlorine analyzer The residual chlorine sensor contains two measuring electrodes, HOCL electrode and temperature electrode. The HOCL electrode is a Clark type amperometric sensor manufactured using microelectronics technology to measure the concentration of hypochlorous acid (HOCl) in water. The sensor consists of three electrodes in a small electrochemical format, a working electrode (WE), a counter electrode (CE) and a reference electrode (RE). The method for measuring the concentration of hypochlorous acid (HOCl) in water is based on measuring the current change of the working electrode due to the change of the concentration of hypochlorous acid. Precautions for the use of residual chlorine analyzer 1. The secondary meter generally does not need daily maintenance. When there is an obvious fault, please do not open it to repair it yourself. 2. After turning on the power, the instrument should have a display. If there is no display or the display is abnormal, Turn off the power immediately and check whether the power is normal. 3. The cable connector must be kept clean and must not be exposed to moisture or water, otherwise the measurement will be inaccurate. 4. The electrodes should be cleaned frequently to ensure that they are not contaminated. 5. The electrodes should be calibrated every once in a while. 6. When the water is cut off, make sure that the electrode is soaked in the liquid to be tested, otherwise its life will be shortened. 7. The use of the residual chlorine analyzer depends largely on the maintenance of the electrode. The above is the working principle and function of the residual chlorine analyzer. In fact, for us humans, we need to add a lot of water every day. Insufficient water will have a great impact on our human body functions. Compared with people who did not drink water for a week and those who did not eat for a week, the situation of those who did not drink water was obviously more serious. In this era of serious water pollution, water quality inspection is very important.
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