pH/TDS/Salt Meter pH Range 0.00 to 14.00 Electric Conductivity Range 0 to 199.9 uS (Conductivity) 200 to 1999 uS 2.0 to 19.9 mS 0 to 9 999ppm (TDS) 0-9 999 ppm (Salinity) TDS Range 0 to 99.96 ppm 100 to 999 pm 1.0 to 9.99 ppt Waterproof Yes Automatic Temperature Compensation Yes Displayed Temperature Range 32 Degrees to 149 Degrees F Salinity Range 100 to 999 ppm Operating Temp Range (F) 32 Degrees to 149 Degrees Operating Temp Range (C) 32 Degrees to 149 Degrees Display LCD