Extech EX900 4-in-1 water quality meter is designed for use in measuring pH, conductivity, total dissolved solids (TDS), and temperature in water samples. This Extech EX900 water quality meter includes a large, easy-to-read LCD, automatic temperature compensation for accurate readings, a built-in memory function to store up to 25 readings, and a USB port for data transfer to a computer
Applications: environmental monitoring, water quality testing, and industrial process control.