Function:Measure pH, TDS, TEMP, EC, Salinity, SG, ORP. Calibrated EC Conductivity: supports 3-point calibration by 3 calibration points (1413uS/cm 12.88 mS/CM 111.8 mS/CM) automatic identification (1413us 12.88ms & 111.8ms) pH: 1 point (6.86) or 2 points (6.86 4.00)) (6.86 9.18) or 3 points (6.86 4.00 9.18) can automatically identify the calibration solution Waterproof grades: IP67The accuracy within 150ppt is relatively accurate and the deviation is greater than 160ppt. Auto Power Off: 5 minutesOperating Environment: 0 to 60.0°c (32.0-140°f); 100% Relative HumidityTDS Ratio: 0.4 to 1.0Temperature Range: 0.1-60.0°c 32.0-140°fTemperature Accuracy: ± 0.5°cTemperature Resolution: 0.1°c/°fPower Supply: 3x1.5LR44Size: 183*37*37mm (7.2*1.5*1.5in)Weight: 105 gramsSpecifications:1.EC Measuring Range: 0 to 10000uS/cm 10.01-19.99ms 20.1-400ms/cmResolution: 1 uS/cm; 0.1ms/cm;Accuracy: ± 2% of Reading2. TDS Measurement Range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0ppt Resolution: 1ppm; 0.1 pointsAccuracy: ± 2% of reading3. Salinity Measurement Range: 0.00 to 25.00%Resolution: 0.01%Accuracy: 0.01-5.00% (± 0.1%) 5.10-25.00% (± 1%)4. PH Measurement Range: 0.01-14.00pHRresolvency: 0.01pHDaccuracy: ± 0.05pH5. ORP Measuring Range: ± 999mV6.SG: Measuring Range: 1.000-1.222Product Included: Test Pen*1, Rechargeable Battery*3, pH Calibration Powder*1, English User Manual*11.7 in 1 Multi-function Pen: This water quality tester adopts 7-in-1 multi-function design, which can measure pH, TDS, WE, ORP, SG, salinity and temperature at the same time with high accuracy. The measuring range is large, wide and accurate, and can measure freshwater salinity and marine salinity. Comprehensive water quality measurement to ensure healthy water quality. The waterproof rating is IP67 and prevents dust from entering.2. Measuring range: The pH meter has high accuracy and resolution. The measuring range is 0.01-14.00pH, resolution: 0.01ph, accuracy: ± 0.05ph. CE measurement range is 0-10000uS/cm 10.01-19.99ms 20.1-400mS/CM, resolution is 1uS/cm, 0.1ms/cm, accuracy: ± 2% reading. TDS Measurement Range: 0-1000ppm 1000ppm-10000ppm 10.1-200.0ppt, Resolution: 1ppm, 0.1 dots, Accuracy: ± 2% of reading.3. Salinity and ORP measurement: salinity measurement range 0.00-25.00%, resolution: 0.01%, accuracy: 0.01-5.00% (± 0.1%) 5.10-25.00% (± 1%). ORP Measurement Range: 0 ± 999mV, SG: Measurement Range: 1.000-1.222, Operating Environment: 0 to 60.0 °C (-0.0-150 °F); Relative humidity 100%. TDS Ratio: 0.4 to 1.0. Temperature Range: 0.1-60°C, Temperature Accuracy: ± 0.5°C, Temperature Resolution: 0.1°C/°F.4. Automatic pH Temperature Compensation: The automatic temperature compensation of our professional PH meter can provide you with the best reading. Unlike other pH meters for hydroponics that only have a range of 0°C-50°C, our pH meters for hydroponics have a better range of 0°C-60°C (-0°F-150°F). Very suitable for drinking water, swimming pools, ponds, beer, kombucha, aquariums, hydroponics, laboratories, food processing, etc. Hi, guys, thank you for visiting my store. If you want to buy more than we listed, please contact us. We will be ready to reply you as soon as possible.