5 in 1 TDS EC PH Salinity Temperature Digital Meter High Accuracy Test Pen Water Quality Tester for Drinking Water PoolsFeatures:1. 5 in 1 Water Quality Meter: The tester has the functions of monitoring TDS, pH, salinity, EC meter and temperature measurement. With this convenient PH tester, you can work faster and easier than ever with complete comfort during your workflow!2. Easy-to-use digital pH meter: Simply remove the protective cap of the PH pen and immerse the pH tester in the solution and press the measuring button. Don't worry about seeing the displayed value when there is not enough light. The tester is equipped with an LCD display that helps you see the measurement clearly in any situation.3. High Accuracy: High, you can mention the algorithm layout and electrodes with our digital ph tester to ensure accurate and fast response. When the measured value is stable, simply press the HOLD/TEMP button to lock the measured value and take it out for viewing, which is really simple.4. Automatic Temperature Compensation: Temperature can affect reading levels, the digital ph meter for water hydroponics has an even better range of 0°c-60°c (32°f-140°f), automatic temperature compensation can ensure that you are getting the best reading, so you can test with confidence in any environment.5. Universal Test: The portable water quality meter can be made anywhere to measure water quality, such as hydroponics, drinking water, tap water, RO water system, aquarium, seawater, pool water, etc. Description:This product has a five-in-one function, which can measure pH, TDS, EC, salinity and temperature. Specifications:Model: EZ-9909 Working Environment: 0 to 60.0 °C (32.0-140 °F); RH 100%TDS Rate: 0.4 to 1.0Auto Power Off: 5 minutesBattery: 3*1.5 LR44 batteryScreen Size: 33*24mmSize: 183*37*37mm (7.2*1.5*1, 5in)Display: Support backlightWaterproof: IP67Power Consumption: 2.9mConductivity Test Range: 0 to 10000us/cm, 10.01-19.99ms, 20.1-400ms/cmResolution: 1uS/cm; 0.1ms/cmAccuracy: ± 2%TDS Test Range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0pptResolution: 1ppm; 0.1ppt Accuracy: ± 2% of reading Salinity measuring range: 0.00 to 25.00% Resolution: 0.01% Accuracy: 0.01-5.00% (± 0.1%) 5.10-25.00% (± 1%)pH Test Range: 0.01-14.00pH Resolution: 0.01pHDaccuracy: ± 0.05pHHuth Temperature Range: 0.1-60.0 °C 32.0-140 °F Temperature Accuracy: ± 0.5 °C Temperature Resolution: 0.1 °C/°F Temperature Compensation: Automatic Temperature Compensation (ATC)Package Included:1*5 in 1 MeterNotes:1. Please allow 0-1 inch error due to manual measurement. Thank you for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object.