Water is the source of all living things, is a very important natural resource, daily life and production activities are inseparable from water. Drinking water quality is closely related to human health. Water quality monitoring and control has become one of the important subjects of modern science. The on-line water quality monitoring system can accurately, timely and comprehensively reflect the current water quality status and development trend, and provide scientific basis for water treatment projects. The sensor front end of the water quality monitoring system is different water quality sensors.
Water quality sensors detect water quality parameters such as conductivity, dissolved oxygen, pH, COD, residual chlorine and turbidity through a variety of detection methods such as chemical, physical and biological reactions of water, providing data support for researchers, observers and engineers. For laboratory research, environmental management improvement, Marine water quality assessment, hydraulic model calibration, sewage treatment and other fields.
What is a water quality sensor?
Water quality sensor is used to measure PH, residual chlorine, turbidity, suspended solids, COD, BOD, conductivity and dissolved oxygen sensors collectively. Water quality is not a specific daily parameter, it contains several elements to measure water condition.
Types of water quality sensors
Water quality is a general concept that covers a wide range. Therefore, the establishment of a complete water quality monitoring system is a complex project. The good news is that with these 5 water quality sensors and a water quality monitoring host, you can easily set up your water quality monitoring system.
- PH Sensor
- Conductivity Sensor
- Residual Chlorine Sensor
- Turbidity Sensor
- Dissolved Oxygen Sensor
PH Sensor
The industrial water PH sensor is a kind of water quality sensor to measure the PH value (hydrogen ion concentration index, PH) of the measured water, the instrument has automatic temperature compensation function. It is suitable for industrial sewage, domestic sewage, agriculture, and aquaculture in non-corrosive weak acid and alkali environment. The output signal is RS485, 4-20mA.
Conductivity Sensor
The JXSBS-3001 water conductivity sensor is a water quality sensor that detects the conductivity value of the water in the north side. The sensor has the automatic temperature compensation function, which can compensate the conductivity of the current temperature to the specified temperature. Depending on the application, we offer both stainless steel electrodes and plastic electrodes. There are RS485 and analog output options.
Residual Chlorine Sensor
Residual chlorine sensor is an industrial water quality sensor used to measure residual chlorine content in solution. Chlorine electrodes are made of high-purity platinum, which provides a high level of protection and can work well even in harsh environments. This residual chlorine sensor has two signal outputs, RS485 and analog. It is widely used for determination of chlorine in natural water, surface water, groundwater and aquaculture.
Turbidity Sensor
The turbidity sensor can monitor the turbidity, suspended solids and sludge concentration in the water.
The water turbidity sensor probe can be used to measure the turbidity of the backwash water of the water plant filter, the turbidity of the raw water and the sedimentation tank, monitor the water quality in the industrial production process, and monitor the surface water, groundwater and conventional pipe network water quality.
Dissolved Oxygen Sensor
Dissolved oxygen sensor is a kind of sensor equipment specially used to measure the concentration of dissolved oxygen in the measured water. There is a DO sensor using fluorescence measurement principle, which does not consume oxygen and does not need electrolyte. The measurement range of dissolved oxygen is 0~20mg/L. Built-in temperature transmitter, with automatic temperature compensation function.11111111111
How to maintain the pH sensor?
If you want the pH sensor to keep in good condition, you must maintain the pH electrode regularly. Without proper maintenance, some common problems that may affect the electrode include: oily coating on the electrode, blockage or fouling of the reference contact, malfunction or breakage of the PH bulb, and short electrode life due to reference poisoning.
If the electrodes are usually coated with oil and other substances, consider using a sensor that includes a non-porous reference junction. The use of automated systems for cleaning electrodes can further reduce your maintenance needs. If the reference junction is often clogged or fouled, a non-porous electrode can also be used as a solution to this problem. If your pH bulb breaks when it comes in contact with sewage, you can use a bulb guard to protect it. As for the problem of reference poisoning, the use of non-porous electrodes can avoid these problems.
How to clean the pH sensor?
It only takes a few simple steps to clean your electrode to properly maintain and clean the pH electrode. Whenever handling pH electrodes, it is important to wear safety glasses and gloves. When the electrodes are not in use, they should always be kept in a liquid solution. If the electrode dries out, it can no longer be used. Most electrodes can only be purchased in saline solution, and you can continue to use them in the future.
In order to clean the electrode, you should put it in a solution consisting of 95% water and 5% hydrochloric acid. When the electrode is placed in this solution, most of the coating will dissolve. The sensor should be soaked for 5-10 minutes and then rinsed off. If the coating around the sensor is particularly heavy, the above steps should be repeated several times. Be sure to wipe the sensor with a soft cloth, as any abrasive cloth or brush will damage the electrode.
Why are different types of pH sensors important?
With modern water pollution becoming more and more serious today, it is urgent to protect the environment and protect water resources. Countries all over the world are paying attention to this issue. In some countries, industry is the backbone of the national economy. They know that it is not good to exchange economic development at the cost of the environment, but they have to do so. Therefore, water pollution is already a headache for the whole world. Sewage treatment equipment was developed under this background. Sewage treatment equipment can effectively treat domestic sewage and industrial waste water in urban areas to prevent sewage and pollutants from directly flowing into waters. PH sensor is an important part of sewage treatment equipment.
The pH value is one of the most commonly used water quality testing indicators, and the pH value of natural water is mostly in the range of 6-9. The pH value of drinking water should be between 6.5 and 8.5. The pH value of some industrial water should be guaranteed to be between 7.0 and 8.5, otherwise it will have a corrosive effect on metal equipment and pipelines. pH value and acidity, alkalinity are both different and connected. The pH value indicates the strength of the acidity and alkalinity of the water, and the acidity or alkalinity is the content of acid or alkali substances in the water. The change of pH in water quality indicates the degree of water pollution.
If the pH of the water is too high or too low, the aquatic organisms in it will die. PH value also affects the dissolved oxygen and toxicity of chemicals and heavy metals in the water. Most aquatic organisms like the pH range between 6.5 and 9.0, but some can live in water bodies with a pH beyond this range.
Therefore, whether it is industrial production, aquaculture, sewage treatment or agricultural production, a ph sensor is needed to detect the ph value in the liquid, which requires us to choose the appropriate ph sensor.
Conclusion
Water quality monitoring covers a wide range of areas, and different application sites need to monitor different parameters. For specific selection and operation, please contact us. We have professional technicians to provide you with the best matching plan.