Lamotte 1749 TDS Temperature Tracer Pocket Tester Auto ranging TDS tracer meter offers 3 ranges to measure pure water to salinity solutions using the same conductivity cell Instructions included for measuring TDS in soil Feature memory stores and recalls 15 readings, data hold, auto shut-off and low battery indication Simultaneous display of conductivity or TDS and temperature Complete with meter and conductivity cell, protective sensor cap and neck strap