Conductivity, and TDS measurements often require separate meters, but the Lutron PCD431 measure 0-2000 and 0-20000 microsiemens/cm and 0-2000 and 0-20000ppm total dissolved solids. It is a pen/pocket style in IP67 waterproof one piece construction with digital display of process value and temperature. Automatic temperature compensation is applied to readings and the factor for ATC is adjustable from 0-5% per degree C.
For use in cooling towers, boiler feedwater, swimming pools, fish hatcheres and a wide variety of other water quality or solution strength measurements. It suits single handed operation, and floats if dropped. The sensor is a long life carbon electrode style, and the unit can be calibrated against standard solutions. Usable in temperatures to 60C, the PCD431 is a tough and versatile instrument.