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The role of conductivity measurement sensor in water quality monitoring

User:JXCTUpload time:Dec 09 2021

The measuring principle of the conductivity measuring sensor is to place two parallel plates in the measured solution. A certain electric potential (usually a sine wave voltage) is added to both ends of the plate. Then measure the current flowing between the plates. The conductivity of water has a certain relationship with the amount of inorganic acid, alkali, and salt. When their concentration is low, the conductivity increases with increasing concentration. Therefore, this indicator is often used to estimate the total concentration of ions or salt content in water.

Conductivity measuring sensor
Conductivity measuring sensor
Why monitor conductivity

Water conductivity is a numerical value that expresses the conductivity of an aqueous solution. This value is closely related to the minerals and content in the water. The number can be calculated to get the change in the concentration of dissolved minerals in the water and the number of ionic compounds in the water. In a laboratory environment, the conductivity of water is usually measured. Check the purity of laboratory water and check the error of water analysis results.

Different types of water have different conductivity. The conductivity of clean distilled water or ion exchange water is about 0.5-2uS/cm. After several weeks of storage, it can rise to 2 to 4 uS/cm due to the absorption of carbon dioxide, sulfur dioxide, ammonia and other soluble gas substances in the air. Generally, the conductivity of natural water is between 50 and 500 uS/cm. The conductivity of clean river water is between 100~300uS/cm. Highly mineralized water can reach 500~1000uS/cm.

Jingxun's conductivity sensor has an intelligent temperature compensation function, which effectively avoids measurement errors caused by temperature changes. It can work stably in an environment of minus 20 degrees to 80 degrees, and has a wider range of application scenarios; it has an intelligent temperature compensation function, which is effective Avoid measurement errors caused by temperature changes, work stably in an environment of minus 20 degrees to 80 degrees, and have a wider range of application scenarios;