1. Conductivity Meter (Conductivity Meter) Principle Conductivity is a digital representation of the ability of a solution to conduct current. The conductivity of water has a certain relationship with the amount of inorganic acids, alkalis and salts it contains. When their concentrations are low, the conductivity increases with the increase of concentration. Therefore, this indicator is often used to estimate the total amount of ions in water. Concentration or salt content.
The conductance (G) is the reciprocal of the resistance (R). Therefore, when two electrodes (usually platinum electrodes or platinum black electrodes) are inserted into the solution, the resistance R between the two electrodes can be measured. According to Ohm's law, when the temperature is constant, this resistance value is proportional to the electrode distance L (cm), which is inversely proportional to the cross-sectional area A (cm2) of the electrode, that is: R=Ï×(L/A) where Ï is the resistivity and is long 1cm, the resistance of the conductor with a cross-sectional area of ​​1cm2 depends on the nature of the material. According to the above equation, the conductance (G) of the conductor can be expressed as follows: G = 1/R = (1/Ï) × (A/L) = K × (1/J) where K = 1/Ï is Electrical conductivity, J=L/A, referred to as electrode constant Electrolyte conductivity refers to the conductance of a 1 cm3 solution between two parallel electrodes spaced 1 cm apart. From the above equation, when the electrode constant (J) is known and the solution resistance (R) or conductance (G) is measured, the conductivity can be determined.
Second, the application of conductivity meter (conductivity meter) Conductivity meter is an essential instrument for measuring the conductivity of aqueous solutions in the laboratory, it is widely used in petroleum, chemical, biological, pharmaceutical, sewage treatment, environmental monitoring, mining and smelting, and colleges. Schools and research institutes.
The conductance (G) is the reciprocal of the resistance (R). Therefore, when two electrodes (usually platinum electrodes or platinum black electrodes) are inserted into the solution, the resistance R between the two electrodes can be measured. According to Ohm's law, when the temperature is constant, this resistance value is proportional to the electrode distance L (cm), which is inversely proportional to the cross-sectional area A (cm2) of the electrode, that is: R=Ï×(L/A) where Ï is the resistivity and is long 1cm, the resistance of the conductor with a cross-sectional area of ​​1cm2 depends on the nature of the material. According to the above equation, the conductance (G) of the conductor can be expressed as follows: G = 1/R = (1/Ï) × (A/L) = K × (1/J) where K = 1/Ï is Electrical conductivity, J=L/A, referred to as electrode constant Electrolyte conductivity refers to the conductance of a 1 cm3 solution between two parallel electrodes spaced 1 cm apart. From the above equation, when the electrode constant (J) is known and the solution resistance (R) or conductance (G) is measured, the conductivity can be determined.
Second, the application of conductivity meter (conductivity meter) Conductivity meter is an essential instrument for measuring the conductivity of aqueous solutions in the laboratory, it is widely used in petroleum, chemical, biological, pharmaceutical, sewage treatment, environmental monitoring, mining and smelting, and colleges. Schools and research institutes.
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