Feature:Multi-functional water quality test pen, which can measure ph pH, solubility, EC conductivity, salinity and temperature. (Sea salt/fresh water salt)It is a waterproof water quality test pen with five functions. It has high performance, pen design and fast numerical value.Parameters:Sea salt: Sea water salinity is the ratio of total dissolved solids to the weight of sea salt in sea water, usually expressed in grams per kilogram of sea water. (Measuring range 10.1-200.0ppt)Light salt: light water with a salt content of less than 0.5g/L (measuring range: 0.00-25.00percent accuracy: 0.01-5.00percent 5.10-25.00percent )Specification:Conductivity test range: 0 to10000uS/cm, 10.01-19.99ms, 20.1-400mS/CMResolution: 1uS/cm; 0.1mS/CMAccuracy: about2percent of reading test range: 0 to 1000ppm, 1000ppm to 10000ppm, 10.1 to 200.0pptResolution: 1ppm; 0.1pptAccuracy: 2percent of readingSalinity (Salinity) measuring range: 0.00 to 25.00percent Resolution: 0.01percent Accuracy: 0.01-5.00% (about0.1percent ), 5.10-25.00% (about 1percent )pH test range: 0.01-14.00pHResolution: 0.01pH Accuracy: about 0.05pHTemperature compensation: Automatic temperature compensation (ATC)Working environment: 0 to 60.0Celsius (32.0-140Fahrenheit); RH 100percent factor: 0.4 to 1.0Temperature range: 0.1-60.0Celsius 32.0-140FahrenheitTemperature accuracy: about 0.5CelsiusTemperature resolution: 0.1Celsius/FahrenheitAuto power off: 5 minutes 3x1.5LR44Display size: about 33x24mmDisplay: Support backlightWaterproof rating: IP67Power consumption: 2.9 mA, power consumption at shutdown is 0.The accuracy within 150ppt is more accurate, the deviation above 160ppt is larger.Package included:1*7 in 1 Water Quality Monitor set(With battery)1*5 in 1 Water Quality Monitor set(Without battery)Notes:1. Every time you use it, you must clean the electrode.2. Please allow minor errors due to manual measurement.3. The colors may have difference due to the different display, please understandNOTE:PO BOX address is not supported, please provide the correct physical addressATTENTION:If the customer change their mind and want to cancel the order, please contact us within 2-3 hours after placing the order. Or, once the package is dispatched, we won't be able to intercept packages in transit. Please understand.