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The Maintenance Method of Dissolved Oxygen Membrane Cap
The dissolved oxygen sensor uses optical measurement technology based on the principle of fluorescence quenching. The measurement is reliable and accurate, and does not require frequent calibration. The sensor does not require reagents during use, and the maintenance is small. The only consumption is the replacement of the membrane cover every 1-2 years. In actual application scenarios, the membrane cover will be attached with contaminants after long-term use, causing the measurement to be...
How to calibrate the OPD700 dissolved oxygen sensor?
Overview The OPD700 dissolved oxygen sensor supports one-point calibration and two-point calibration. One-point calibration is 100% full-scale calibration. Usually, one-point calibration can meet most usage requirements. Adding zero-point calibration on the basis of 100% saturation calibration is two-point calibration. If the measured dissolved oxygen concentration is relatively low, a two-point calibration is required to obtain more accurate data. < img...
Why and how to monitor the pH value of circulating cooling water?
Circulating cooling water requires the use of an online pH analyzer to monitor the pH value, because the pH value can affect the corrosion and precipitation of the cooling water. If the pH value of the cooling water is too high or too low, it will lead to increase corrosion of metal pipes and equipment. It will also affect the formation of scale and sediment in the cooling water, reduce the cooling effect, and increase energy consumption and maintenance costs. Therefore, monitoring and...
Introduction to the detection method of COD BOD5 NH3-N in sewage treatment plants
Sewage treatment plants are sewage and wastewater discharged from pollution sources. Because the total amount or concentration of pollutants is high and does not meet the discharge standard requirements or does not meet the environmental capacity requirements, thus reducing the water environment quality and functional objectives, it must undergo artificial intensification treatment. place. It is generally divided into urban centralized sewage treatment plants and decentralized sewage treatment...
What is the ion selective electrode method?
Overview Ion selective electrodes (ISE) are modern analytical tools that enable rapid and direct determination of ion activity in sample solutions. Together with a suitable ion meter or titrator, the ISE forms an affordable and versatile measuring system. Like the ph theory, the ISE theory is also based on the Nernst equation. ISE's approach is easy to understand and simple to apply in many situations. Ion selective electrodes are used to measure the activity of the ions being measured. Ions...
What are the effluent quality standards for reverse osmosis water treatment?
With the continuous acceleration of industrialization and urbanization, water pollution problems are becoming more and more serious. How to correctly treat sewage has become the number one problem in the construction of modern cities. As an important water treatment technology, reverse osmosis technology is widely used in various fields. Water quality analysis instruments such as pH analyzer, conductivity analyzer, and ammonia nitrogen analyzer will be used in reverse osmosis water quality...
What is TDS? How to detect the TDS value of water?
TDS is the abbreviation of total dissolved solids, also known as total dissolved solids. The measurement unit is mg/L, which indicates how many milligrams of dissolved solids are dissolved in 1 liter of water. The higher the TDS value, the more dissolved substances the water contains. Total dissolved solids refers to the total amount of all solutes in water, including the content of both inorganic and organic matter. Generally, the conductivity value can be used to roughly understand the salt...
What is the difference between temperature compensation of conductivity and pH?
? Overview The conductivity is closely related to the degree of dissociation of the electrolyte in water and the migration speed of ions, and the degree of dissociation and migration speed are related to the temperature of the solution. As the temperature increases, the conductivity of the solution increases; on the contrary, the conductivity decreases. In order to overcome the influence of temperature and make the conductivity of different solutions at different temperatures comparable, when...
What is the impact of ammonia nitrogen content on aquaculture water?
Ammonia nitrogen refers to the nitrogen present in the water in the form of free ammonia NH3 and ammonium ions NH4+. Ammonia nitrogen is an important water quality indicator that has attracted much attention in aquaculture. Ammonia nitrogen in aquaculture water bodies is composed of non-ionized ammonia(NH3-N) and ionic ammonium(NH4+-N). It mainly comes from the transformation and decomposition of nitrogen-containing substances, including inorganic and organic nitrogen fertilizers, excreta and...
How does the sewage treatment plant deal with the problem of excessive ammonium?
Excessive ammonina nitrogen in water bodies is mostly related to human activities, such as wastewater generated from industrial production, agricultural activities, and sewage treatment. If the high concentration of ammonium nitrogen in these wastewater is not treated or these are problems in the treatment process, it will be discharged directly and cause excessive ammonia nitrogen in natural water bodies. Another situation is when a large amount of organic matter enters natural water bodies,...
What is the sodium difference of pH glass electrode?
pH is a scale of hydrogen ion activity in a solution, which is generally a measure of how acidic or alkaline a solution is. The pH value refers to the logarithm of the reciprocal of the hydrogen ion activity of the solution. The closer the pH value is to 0, the more acidic the solution is, and conversely, the closer the pH value is to 14, the more alkaline the solution is. At room temperature, a solution with pH=7 is called a neutral solution. The glass electrode pH sensor has high measurement...
What is the impact of the pH value of tap water on users?
Overview The water supply(tap water) in the city mainly draws from rivers, lakes, groundwater, and surface water through the water intake pumping stations of the waterworks. The waterworks are processed by the waterworks in accordance with the standard through sedimentation, disinfectant, filtration and other processes, and are finally transported to the users in various areas through the water distribution pumping stations.Nowadays, most tap water disinfection uses chlorination method. The...
What water quality parameters need to be monitored in cooling towers?
A cooling tower is a device used to reduce heat in industrial equipment, power plants, and other large building. They lower the temperature of the water by bringing it into contact with air. In a circulating water system, water is used to cool the heat generated in equipment or processes. The hot water first flows into the top of the cooling tower through pipes, and is then dispersed into a thin water film, which is evenly distributed through fillers or nozzles in the tower. At the same time,...
There are two basic types of conductivity, including contact conductivity and toroidal conductivity. The main difference between these two types of conductivity design is how the sensor is built. Because the two sensors are constructed differently, each is suitable for different applications. Which sensor to use depends on the conductivity of the water, the concentration of dissolved solids in the water, and the corrosive nature of the water. Toroidal conductivity sensors are the best choice...
What parameters are monitored for water quality in the food and beverage industry?
Water used in food production is closely related to food quality. Some common food quality problems such as discoloration, fading, staining, odor, turbidity, sedimentation, etc. may be caused by water quality. Water used for food production can be divided into groundwater and surface water according to the source; it can be divided into soft water, hard water, alkaline water, acid water, and salt water according to the water quality; it can be divided into production raw material water and...
What is the difference between pure water and ultrapure water?
In the water treatment industry, we often hear about pure water and ultrapure water, so what is the difference between them? Whether it is pure water or ultrapure water, the conductivity value is a standard to measure the difference between them. How to monitor the conductivity value of pure water and ultrapure water? The ASCK stainless steel series online conductivity sensors developed and produced by Daruifuno have different K constants for different applications. Usually the conductivity...
What does RS-485 mean and what is the function of RS485 online pH controller?
Overview Current electronic devices communicate with computers through serial ports. RS485 is one of the traditional serial interfaces widely used at present. RS485 is very common in industrial automation and is used in industrial networks, including Modbus, profibus DP, ARCNET, BitBus, WorldFip, LON, Interbus and other non-standard networks. Currently, the serial RS485 port is considered the most efficient method of serial communication. The online pH controller developed and produced by...
What is the analog 4-20 mA current output?
Overview 4-20mA analog output represents a prevalent analog control technique, predominantly utilized by controllers for the remote transmission of sensor signals. This method involves converting sensor signals into a 4-20mA analog signal, which is then transmitted to the control system. Owing to its excellent stability, reliability, and high precision, the 4-20mA analog output has found widespread application in industrial control settings. The 4-20mA DC signal system is the analog signal...
What are the water quality monitoring parameters for pharmaceutical process water?
Pharmaceutical water is a widely used auxiliary material in drug production. It is widely used in the drug production process and the preparation of pharmaceutical preparations. It is also used as a solvent, rinse agent, etc. The quality of pharmaceutical water directly affects the quality of drugs and is closely related to the safety of drugs. Pharmaceutical water can be divided into drinking water, purified water, water for injection, and sterile water for injection according to its different...
What are the monitoring indicators for papermaking wastewater quality?
Water quality indicators are the main basis for monitoring, evaluating and pollution control of water bodies. Including physical indicators (suspended solid content, total solid content, turbidity, temperature, color, conductivity, etc.), chemical indicators (biochemical oxygen demand, chemical oxygen demand, total organic carbon, total organic chlorine, etc.), biological indicators (Total number of bacteria, number of E. coli), among which suspended solids content, biochemical oxygen...
What is the difference between suspended solids and turbidity?
In sewage treatment, we often see monitoring indicators of SS and turbidity, so what do these two indicators mean? What is the difference between them? First of all, the concepts of the two are completely different. SS is the abbreviation of suspended solids, which refers to solid matter that cannot pass through the filter(filter paper or filter membrane), including suspended solids and dissolved solids. The unit is mg/L. It mainly refers to insoluble solids such as soil, sand, and animal and...
What are the advantages and disadvantages of measuring COD by UV absorption method?
The basic measurement principle of the UV online COD sensor is based on the absorption of ultraviolet rays by organic matter in sewage. When organic substances containing conjugated double bonds or polycyclic aromatic hydrocarbons are dissolved in water, they absorb ultraviolet light. Therefore, by measuring the absorption of 254nm ultraviolet light by these organic substances, we can evaluate the degree of pollution of water bodies by these organic substances. UV method online COD sensor is...
How to use the COD controller to calibrate the COD sensor?
COD is the amount of oxidant consumed when a certain strong oxidant is used to treat water samples under certain conditions. It reflects the degree of material pollution in the water. The greater the chemical oxygen demand, the more serious the pollution by organic matter in the water. COD is expressed in mg/L, and the COD value can be monitored through water quality monitoring instruments. The online COD sensor COD351 developed and produced by Daruifuno adopts the principle of ultraviolet...
What are the types and measurement principles of conductivity sensor?
Overview conductivity sensors are divided into electrode-type conductivity sensors, inductive-type conductivity sensors and ultrasonic conductivity sensors based on different measurement principles and methods. The electrode-type conductivity sensor uses the resistance measurement method to measure conductivity based on the principle of electrolytic conductivity. The conductivity measurement electrode behaves as a complex electrochemical system during the measurement process. The...
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