Test Meter pH/TDS/Conductivity/Salinity Pen pH Range 0.00 to 14.00 Electric Conductivity Range 0 to 19.99 mS/cm TDS Range 0.1 ppm (mg/L) to 9.99 ppt (g/L) Waterproof Yes Automatic Temperature Compensation Yes Displayed Temperature Range 0 Degrees to 65 Degrees C 32 Degrees to 149 Degrees F Salinity Range 0.1 ppm (mg/L) to 9.99 ppt (g/L) Operating Temp Range (F) 32 Degrees to 149 Degrees F Operating Temp Range (C) 0 Degrees to 65 Degrees C Display LCD