pH/Conductivity Kit pH Range 0.00 to 14.00 Electric Conductivity Range 0 to 19.99 mS/cm TDS Range 0 to 99.9 ppm 1.00 to 9.99 ppt 100 to 999 ppm Waterproof Yes Automatic Temperature Compensation Yes Displayed Temperature Range 0 Degrees to 65 Degrees C 32 Degrees to 149 Degrees F Operating Temp Range (F) 23 Degrees to 194 Degrees F Operating Temp Range (C) -5 Degrees to 90 Degrees C Resistivity Range 0 to 99.9 ppm 1.00 to 9.99 ppt 100 to 999 ppm Display Dual Line LCD