A TDS Meter is a device used to measure the total dissolved solids (TDS) in water. TDS refers to the combined content of all inorganic and organic substances present in water, which can affect its quality and taste. The meter provides a numerical value, usually in parts per million (ppm), indicating the concentration of these solids. TDS meters are commonly used in various settings, including aquariums, drinking water testing, and hydroponics. By monitoring TDS levels, users can ensure that water quality meets specific standards, helping to maintain healthy environments for plants, fish, and human consumption.