An electrical conductivity meter is a device used to measure the ability of a solution to conduct electricity. This ability is influenced by the presence of ions in the solution, which can come from salts, acids, or bases. The meter provides readings in units such as microsiemens per centimeter (µS/cm) or millisiemens per centimeter (mS/cm), helping users assess water quality or the concentration of dissolved substances. These meters are commonly used in various fields, including environmental monitoring, aquaculture, and hydroponics. They help ensure optimal conditions for aquatic life and plant growth by providing essential data on water salinity and nutrient levels.