sähkönjohtuvuuskammiot

Sähkönjohtuvuuskammiot, often translated as conductivity cells or cells for electrical conductivity measurement, are devices used to measure the electrical conductivity of liquids. These cells are fundamental tools in various scientific and industrial applications, including water quality monitoring, chemical analysis, and industrial process control. The primary principle behind their operation is the measurement of electrical resistance between two electrodes immersed in the liquid. The conductivity is inversely proportional to the resistance.

A typical sähkönjohtuvuuskammio consists of a body, often made of inert materials like glass or plastic, which houses two or more electrodes. These electrodes are usually made of noble metals such as platinum, or sometimes graphite, to prevent corrosion and ensure accurate measurements. The distance between the electrodes and their surface area are precisely defined, which determines the cell constant. This cell constant is crucial for converting the measured resistance into conductivity values, typically expressed in Siemens per meter (S/m) or its common sub-units like milliSiemens per centimeter (mS/cm) or microSiemens per centimeter (µS/cm).

The performance of a sähkönjohtuvuuskammio can be affected by factors such as temperature, electrode fouling, and the presence of air bubbles. Therefore, many modern conductivity meters incorporate temperature compensation mechanisms, often using thermistors, to ensure accurate readings across a range of temperatures. Calibration of the conductivity cell with standard solutions is also essential for maintaining measurement accuracy. The design and application of sähkönjohtuvuuskammiot vary widely depending on the specific requirements of the measurement, from simple dip-type cells to more complex flow-through cells.