Conductivity/TDS/Resistivity/Salinity Meter Electric Conductivity Range Not Applicable TDS Range 0 to 100 ppt Waterproof IP67 Automatic Temperature Compensation Yes Displayed Temperature Range -22 to 266 Degrees F -30 Degrees to 130 Degrees C Salinity Range 0 to 100 ppt Operating Temp Range (F) -22 Degrees to 266 Degrees F Operating Temp Range (C) -30 Degrees to 130 Degrees C Resistivity Range 0 to 20.000 megaohms Display Backlit LCD Auto Power Off Yes Memory 1000