TDS meter is the abbreviation of "Total Dissolved Solid" in English, meaning the total amount of dissolved solids. Total dissolved solids refer to the sum of inorganic salts and organic matter dissolved in water. Its main components include calcium, magnesium, sodium, potassium ions, carbonate ions, bicarbonate ions, chloride ions, sulfate ions, and nitrate ions. Therefore, a TDS meter is an instrument for measuring the total amount of dissolved solids. The unit of the TDS meter is ppm (i.e., mg/L), and its value is defined as a certain proportion of the conductivity value, generally around 0.7. The reference temperature for automatic temperature compensation of the TDS meter is generally 25°C, and the temperature coefficient is generally 2%/°C.   


KL-1393A TDS meter is waterproof with an IP55 rating.   


KL-1393B TDS meter can be wall-mounted or embedded, making it easy to install, operate, and maintain. It supports both AC and DC power. 

It features fast and accurate measurement with a sturdy and durable housing.