Background:
Residual chlorine sensor is an important part of water treatment and monitoring system, which can accurately measure free and total residual chlorine levels in water. These sensors are used in a wide range of applications from municipal water treatment plants to swimming pools and spas.
Working principle of residual chlorine sensor
Residual chlorine sensor is used to measure the concentration of free residual chlorine and total residual chlorine in water. Free residual chlorine refers to chlorine that remains in water after reacting with contaminants, while total residual chlorine includes free chlorine and chlorine that reacts with organic and inorganic compounds in water. Measuring residual chlorine levels is critical to ensuring the effectiveness of the water treatment process, as chlorine is one of the most commonly used disinfectants used to kill harmful microorganisms.
There are several types of residual chlorine detectors, each with its own working principle. One of the most common types is an amperometric sensor, which works by measuring the current generated when chlorine reacts with an electrode. The ampere sensor consists of two electrodes separated by a membrane. One electrode is coated with a catalyst, such as platinum, that promotes the reaction between chlorine and water to produce hypochlorous acid. The other electrode acts as a reference electrode, and the membrane between the electrodes allows hypochlorite to diffuse through it and react with the catalyst-coated electrode. The current generated by this reaction is proportional to the concentration of residual chlorine in the water.
Residual chlorine sensor application :
Residual chlorine sensors have a wide range of applications, including:
Drinking water treatment: Residual chlorine sensors are used at drinking water treatment plants to monitor the concentration of chlorine in water. Sensors ensure that chlorine concentrations remain within safe limits and do not exceed the maximum allowable concentration.
Swimming pool and spa water treatment: Residual chlorine sensors are used in swimming pool and thermal spring water treatment systems to monitor the concentration of chlorine in water. Sensors ensure that chlorine concentrations remain within safe limits and do not exceed the maximum allowable concentration.
Food and beverage processing: Residual chlorine sensors are used in food and beverage processing plants to monitor chlorine concentrations in water used for cleaning and hygiene purposes. Sensors ensure that chlorine concentrations remain within safe limits and do not exceed the maximum allowable concentration.
Industrial wastewater treatment: Residual chlorine sensors are used in industrial wastewater treatment plants to monitor the concentration of chlorine in wastewater. Sensors ensure that chlorine concentrations remain within safe limits and do not exceed the maximum allowable concentration.
Advantages of residual chlorine sensor :
1.Improve water quality:
Residual chlorine sensors ensure that chlorine concentrations in water are kept within safe limits. This improves the quality of the water, making it safe to drink or use for other purposes.
2.Cost effectiveness:
Residual chlorine transmitters are relatively inexpensive compared to other types of water quality sensors. They are easy to install and maintain, which makes them a cost-effective solution for monitoring chlorine concentrations in water.
3.Real-time monitoring:
Residual chlorine sensors can monitor the concentration of chlorine in water in real time. This allows for the rapid detection of any anomalies in chlorine concentrations and immediate corrective action.