The AD31 is a waterproof tester designed to measure Conductivity, TDS, and temperature. Its fully sealed housing protects against humidity, ensuring durability. All Conductivity and TDS measurements are automatically temperature compensated (ATC), with temperature readings available in both °C and °F. Users can adjust the Conductivity/TDS conversion factor (CONV) and the temperature compensation coefficient ß (BETA). The device supports one-point calibration and delivers highly accurate results, featuring a stability indicator on the LCD display. It also includes a low battery indicator to alert users when it’s time to replace the batteries.

Supplied in a carton box complete with protective cap, calibration solution in sachet (1413 µS/cm, 20 ml), 4 x 1.5V batteries and user manual.