When it comes to determining the style of conductivity meter, Shanghai Boqu Instrument Co., Ltd. involves the quality, style, features, trademarks, and packaging into the design. In order to meet a certain demand of the target market and gain a high level of customer satisfaction, we make decisions on the level of product quality by constantly improving product quality and gradually enriching product functions. We also continuously develop new products, improve technology and equipment technology content, and constantly reduce costs to provide a much better product to our old and new customer, so as to maintain a higher market share and investment rate of return. And we improve the style of conductivity meter in some degrees in accordance with the customers’ requirements, which can add our products’ distinguishing features.

The combination of the online cod analyser and online cod analyser facilitates BOQU to be the leading cod analyzer manufacturer. Boqu Instrument focuses on providing a variety of ph sensor for customers. The necessary inspections of BOQU automated water quality sampler have been conducted. These inspections include moisture content, dimension stability, static loading, colors, and texture. When emergencies happen, it can discharge residual reactants and resume working status automatically. Since the product is able to maintain its original brightness throughout the lifespan over time, people can use it for a long time without replacing. It supports multi-channel measurements in water samples.

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The rejection rate of Boqu Online Conductivity Meter is fairly low in the marketplace. Before shipment, we'll examine the quality of every product to guarantee its zero defect. Once our customers receive second-best product or experience the quality issue, our after-sales team are always ready to solve the problems for you.

Shanghai Boqu Instrument Co., Ltd. is noted for expertise in manufacturing dissolved oxygen sensor and possesses vast experience in delivering high-quality products. Boqu Instrument's ultrasonic level meter is various in types and styles to meet the different needs of customers. In order to capture the market opportunities,Boqu Instrument adopt the most cutting edge technique in China. Its shell is made to be highly wear-resistant. Excellent product quality and comprehensive functions give users a better experience. It is highly resistant to chemical substances such as alkali and acid.

Currently, our business goal is to offer more professional and real-time customer service. We are going to expand our customer service team, and implement a policy that customers are guaranteed to receive feedback from our staff before the end of the business day.

In general water quality monitoring, the more common detection items include chroma, turbidity, PH value, etc. COD (chemical oxygen demand) and BOD (biochemical oxygen demand) are also detected in sewage detection. For the detection of BOD, the conventional method is to measure the biochemical oxygen demand for 5 days to calculate the BOD value of the water sample to be tested. However, due to the complexity of this method, the requirements for operators are relatively high, and the detection time is five days. The main method now is to use the microbial electrode method to quickly measure BOD. The core of the microbial electrode method is the microbial electrode of the instrument. The normal operation of each part in the electrode can ensure the accuracy of the instrument detection data. Microbial electrodes are sensors that combine microbial technology with electrochemical detection technology. It mainly consists of a dissolved oxygen electrode and an immobilized microbial film attached to the surface of its gas-permeable membrane. The principle of the reaction to BOD substances is: when the bottom liquid without BOD substances is inserted at a constant temperature and a certain concentration of dissolved oxygen, the rate at which dissolved oxygen molecules in the bottom liquid enter the oxygen electrode through diffusion. The microbial film has a certain respiratory activity due to the microorganisms. Of course, the microbial electrode outputs a steady-state current; if a BOD substance is added to the bottom liquid, molecules of that substance will diffuse into the microbial film along with oxygen molecules, because the microorganisms in the film assimilate the BOD substance and consume oxygen to enter the microbial film . The reduction of the oxygen molecules in the oxygen electrode, that is, the reduction in the rate of diffusion into the oxygen electrode, causes the electrode output current to decrease and drop to a new steady-state value within a few minutes. In a suitable BOD substance concentration range, the reduction value of the electrode output current has a linear relationship with the BOD substance concentration, and the BOD substance concentration has a quantitative relationship with the BOD value. Therefore, the BOD of the water sample to be tested can be known according to the current drop value. The microbial film in the microbial electrode mainly performs assimilation during the detection process. Assimilation (also known as anabolism) is the process by which an organism converts nutrients obtained from the external environment into its own constituent substances and stores energy. That is, a series of metabolic pathways in which organisms use energy to synthesize small molecules into macromolecules. In the detection reaction, the liquid to be tested is equivalent to the external environment, and the dissolved oxygen in the liquid to be tested is the nutrient. When waiting for the liquid to be tested to flow through the microbial membrane, the organic matter in the liquid promotes the assimilation of microorganisms, consumes the dissolved oxygen in the liquid to be tested, and reduces the oxygen content, thereby affecting the potential change of the electrode, and then calculates according to the potential change. Obtain the BOD value of the liquid to be tested. Using the microbial electrode method can not only greatly shorten the detection time of samples (from the original 5 days to 8 minutes), but also greatly reduce the requirements for operators, and people who have never been exposed to chemical experiments can also receive simple training. Testing will be done independently soon. The microbial electrode method not only improves the detection speed, but also ensures the accuracy of the detection results. Compared with the measurement results of the five-day method, the error of our company's BOD220 rapid tester is kept below 5%, within a reasonable error range. The microbial electrode method BOD rapid analyzer provides a more complete solution for BOD determination in water quality monitoring.
Shanghai Boqu Instrument Co., Ltd. has an array of branches in domestic for munufacturing water analyzer.
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The electrode of the conductivity meter, referred to as the conductivity electrode, is generally divided into two types: 1) The two-electrode conductivity electrode is the most widely used conductivity electrode type in China at present. The structure of the experimental two-electrode conductivity electrode is the Two platinum sheets are sintered on two parallel glass sheets, or on the inner wall of a circular glass tube, and the conductance electrodes with different constant values ​​can be made by adjusting the area and distance of the platinum sheets. Usually there are K=1, K=5, K=10 and other types. The two-electrode conductivity electrode used on the online conductivity meter is often made into a cylindrical symmetrical electrode. When K=1, graphite is often used, and when K=0.1, 0.01, the material can be stainless steel or titanium alloy. 2) Four-pole conductivity electrode, generally there are several ring-shaped electrodes on the support body, through different combinations of ring-shaped electrodes in series and parallel, conductance electrodes with different constants can be made. The material of the ring electrode can be graphite, stainless steel, titanium alloy and platinum. The advantage of the four-electrode conductivity electrode is that it can avoid the measurement error caused by electrode polarization, and it is widely used in foreign experimental and online conductivity meters. 3) Electromagnetic conductivity electrode: The characteristic of electromagnetic conductivity electrode is that it is suitable for measuring solutions with high conductivity. It is generally used in industrial conductivity meters, or it can be used to make a single-component concentration meter using its measurement principle, such as the concentration of hydrochloric acid. meter, nitric acid concentration meter, etc.

The Different Types of Sensors Used in Online Conductivity Meters and Their Applications

Online conductivity meters are used in a wide range of industries, including food and beverage, pharmaceuticals, chemical processing, and water treatment. These meters are designed to measure the electrical conductivity of liquids, which can be an indicator of their purity or concentration. There are various types of sensors that can be used in online conductivity meters, each with its own advantages and applications.

1. Introduction to Conductivity Sensors

Conductivity sensors are used to measure the electrical conductivity of liquids. The conductivity of a liquid is determined by the amount of ions present in the solution. The more ions present, the higher the conductivity. In online conductivity meters, the sensors are used to measure the electrical conductivity of the liquid being monitored. This measurement can be used to determine the purity or concentration of the liquid.

2. Electrode Sensors

Electrode sensors are the most common type of conductivity sensor used in online meters. These sensors consist of two electrodes, one that is positively charged and one that is negatively charged. When the liquid being measured flows between the electrodes, an electrical current is created that is proportional to the conductivity of the liquid. Electrode sensors are easy to use and provide accurate measurements over a wide range of conductivity levels.

3. Inductive Sensors

Inductive sensors are another type of conductivity sensor used in online meters. These sensors use an electromagnetic field to measure the conductivity of the liquid being monitored. The sensor consists of a coil that is placed around the outside of a pipe or vessel. When a conductive liquid flows through the vessel, it creates an electrical current that is detected by the coil. Inductive sensors are particularly useful for measuring the conductivity of liquids that are not easily accessible or are hazardous to handle.

4. Capacitive Sensors

Capacitive sensors use an electric field to measure the conductivity of the liquid being monitored. These sensors consist of two plates that are separated by a gap. When the liquid flows between the plates, it creates a change in capacitance that is proportional to the conductivity of the liquid. Capacitive sensors are particularly useful for measuring the conductivity of low-conductivity liquids, such as purified water.

5. Optical Sensors

Optical sensors use light to measure the conductivity of the liquid being monitored. These sensors use an LED and a photodiode to monitor the amount of light that passes through the liquid. The amount of light that passes through the liquid is proportional to the conductivity of the liquid. Optical sensors are particularly useful for measuring the conductivity of liquids that are opaque or contain solids.

6. Applications of Online Conductivity Meters

Online conductivity meters are used in a wide range of industries. In the food and beverage industry, conductivity meters are used to monitor the quality and consistency of beverages, such as beer and soft drinks. In the pharmaceutical industry, conductivity meters are used to monitor the purity of water used in drug production. In the chemical processing industry, conductivity meters are used to monitor the concentration of chemicals in various processes. In the water treatment industry, conductivity meters are used to monitor the purity of water being treated for human consumption.

In conclusion, there are various types of sensors that can be used in online conductivity meters, each with its own advantages and applications. Electrode sensors are the most common type of sensor used, but inductive, capacitive, and optical sensors are also useful in different applications. With the ability to monitor the conductivity of liquids in real-time, online conductivity meters provide valuable information for ensuring quality and consistency in a wide range of industries.