Record accurate and reliable conductivity, total dissolved solids (TDS), salinity, resistivity and temperature measurements with the ST 333 Conductivity Portable Meter, ideal for a wide range of applications and advanced conductivity analysis in the field. Obtain temperature compensated readings using linear, non-linear or EP options with 15, 20 or 25 °C reference temperatures. Log up to 1000 data point sets with time / date stamp and transfer via USB or RS232 to a printer or computer. Water proof Don’t leave your measurements to chance when analyzing samples outside the lab.ST 333 conductivity portable meters are designed to offer the reliability you need in a user-friendly package for your dedicated conductivity testing needs. This waterproof portable meter displays critical data with your measurement including temperature, date and time, read type, measurement stability, active calibration info and power source status.