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Use of Conductivity Meter in Water Quality Monitoring

The conductivity meter is a high-end online water quality analysis instrument with a wide temperature range, operating in a high temperature environment. It is developed for water quality management and automatic control in medical multi-effect distilled water systems, boiler bottom water, condensate water, heat exchange systems, industrial thermal cleaning of mechanical parts, industrial circulating water, etc.
Conductivity is a digital representation of the ability of a solution to conduct current, as opposed to resistance. The measuring principle of conductivity meter is to put two parallel plates into the solution to be tested, add a certain potential to both ends of the plates, and then measure the current flowing between the plates. The conductivity meter is an instrument suitable for precise measurement of various liquid media. When equipped with a corresponding constant electrode, it can accurately measure the conductivity of high-purity water. It can be widely used in drinking water and sewage, chemical, petrochemical, pulp and paper, food and beverage, sugar, steel, surface treatment, steam power generation and electronic products, semiconductors, and pharmaceutical industries.
Conductance is an important indicator to measure water quality. It represents the concentration of electrolytes in the water, and its value has a certain relationship with the amount of inorganic acid, alkali, and salt contained in it. It is directly proportional to the concentration of dissolved solids, and the higher the solids concentration, the greater the conductivity. Different types of water have different conductivity. The conductivity of fresh distilled water is very small, but after a period of time, it increases due to the absorption of carbon dioxide, while the conductivity of ultra-pure water is lower than usual. In water quality monitoring, the total hardness value of water can be obtained indirectly by using a conductivity meter.
Since conductivity is so closely related to water quality, how do we use a conductivity meter to measure the conductivity of water? Here we mainly talk about the actual conductivity measurement (converted to the conductivity value at 25 ℃) method.
Measurement of actual conductivity
1. Wash the electrode probe with distilled water and absorb the water droplets with filter paper
2. Rinse the probe with a small amount of solution to be tested
3. Set the electrode constant
4. Select the temperature coefficient
5. Select temperature compensation mode
6. Immerse the conductivity electrode in the solution to be tested, stir slowly, and read after the measured value is stable. The measurement is complete.
In fact, the conductivity meter is widely used in water plants, power plants, paper mills, metallurgy and chemical refining to monitor the water quality during production process.
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