Features15 in 1: This water quality test pen can measure PH, salinity, temperature, TDS and EC, multifunctional. 2IP67 Waterproof: Using sophisticated production technology, IP67 waterproof, it can still be used after falling into the fish tank. 3Water Quality Meter: The multifunctional water quality tester is automatically calibrated, with replaceable probes, with backlit. 4Measurable Salinity: Measurable salinity (sea salt, freshwater salt). Sea Salt: The measurement range of sea water salinity is 10.1?200.0ppt. Light salt measurement range: 0.00?25.00%, accuracy: 0.01?5.00% 5.10?25.00%. 5Uses: It is suitable for the determination of various values of water quality in drinking water, aquaculture, swimming pools, etc.SpecificationItem Type: Digital Water Quality MeterMaterial: ABSConductivity Test Range: 0 to 10000us/cm 10.01-19.99ms 20.1-400ms/cmResolution: 1us/cm; 0.1ms/cmAccuracy: 2% of ReadingTDS Test Range: 0 to 10000ppm 10.1 to 200.0pptResolution: 1ppm, 0.1pptAccuracy: 2%f.s of ReadingSalinity Measurement Range: 0.01% to 25.00%Resolution: 0.01%Accuracy: 0.01-5.00% (0.1%) 5.1-25.00% (1%)2%f.sPH Test Range: 0.00-14.00phResolution: 0.01PH, Accuracy: 0.05phTemperature Compensation: Automatic Temperature Compensation (ATC)Working Environment: 0 to 60.0 (32.0-140), RH 100%Temperature Range: 0-60.0 32.0-140Temperature Accuracy: 0.5Temperature Resolution: 1/Automatic Shutdown: 5 MinutesBattery: 3 x LR44 (not Included)Waterproof Grade: Ip67Uses: Suitable for the Determination of Various Values of Water Quality in Drinking Water, Aquaculture, Swimming Pools, Etc.Weight: Approx. 140g / 4.9ozPackage List1 xDigital Water Quality Meter 1 x User Manual 3 x Testing Powder