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Conductivity Meter The Higher The Concentration Of Solids, The Greater The Conductivity
Oct 23, 2017

The Conductivity Meter is a type of water system which is oriented to the medical multi-effect distilled water. Boiler bottom water, condensate, heat exchange system, mechanical parts of industrial heat cleaning, industrial circulating water, etc. in the higher temperature environment operation of high-end water quality management and automation control and developed a wide temperature range of on-line water quality analysis instrumentation. Today's little series is just like everyone to introduce its application in water quality monitoring.

The conductivity of a number indicates the ability of a solution to transmit current, as opposed to a resistance value. The measuring principle of the conductivity meter is to place two parallel plates in the measured solution, with a certain potential at both ends of the plate, and then to measure the current flowing between the plates. Electrical conductivity meter is suitable for the precision measurement of various liquid medium equipment, when matching with the corresponding constant electrode can accurately measure the high purity water conductivity. Can be widely used in drinking water and sewage, chemical, petrochemical, pulp and paper, food and beverages, sugar, steel, surface treatment, steam power generation and electronic products, semiconductor, pharmaceutical industry.

Conductance is an important index to measure water quality, it indicates that the concentration of electrolyte exists in water, and its value is related to the amount of inorganic acid, alkali and salt, which is proportional to the concentration of dissolved solids, and the higher the solid concentration, the greater the conductivity. Different types of water have different conductivity. The conductivity of fresh distilled water is small but is increased after a period of time, because of the absorption of carbon dioxide and the conductivity of ultra-pure water is less than normal. In water quality monitoring, the total hardness value of water can be obtained indirectly by using conductivity meter. However, it is necessary to note that the theoretical error of $number (S·M-1) is measured indirectly by the conductivity of the water.

Since the conductivity is so closely related to water quality, how do we use the conductivity meter to measure the conductivity in water? Here we mainly talk about the actual conductivity measurement (converted to 25 ℃ when the conductivity value) method.

The conductivity meter is the two parallel plates, placed in the measured solution, at both ends of the plate with a certain potential (usually voltage), and then measure the flow between the plates. According to the Ohm, the reciprocal of the conductivity (G)-Resistance (R) is determined by the conductor itself.

Because the geometrical shape of the conductivity pool affects the conductivity value, the standard measurement is represented by the unit conductivity s/cm to compensate for the difference in the size of various electrodes. The unit conductivity (C) is simply the product of the measured conductivity (G) and the conductivity pool constant (l/a). Here L is the length of the liquid column between the two plates, a is the area of the plate.

The conductivity of aqueous solution is directly proportional to the concentration of dissolved solids, and the higher the concentration of solids, the greater the conductivity.