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ing the displayed value when there is insufficient light.Tester features Backlit LCD to help you see the measurement clearly in any situation.3. High Accuracy: High-accuracy algorithm chip and electrode of our digital water ph tester ensure accurate and fast response. When the measured value is stable, just press the HOLD/TEMP key to lock the measured value and take it out for viewing, which is really simple.4. A tomatic Temperature Compensation: Temperature can affect reading levels,Digital PH Meter for water hydroponics has a 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. Multi-purpose Test: Portable Water Quality Meter can be carried anywhere to measure water quality such as Hydropon Description:This product has a five-in-one function, which can measure pH, TDS, EC, salinity and temperature. Specifications:Model: EZ-9909AWorking environment: 0 to 60.0℃ (32.0-140℉); RH 100%TDS factor: 0.4 to 1.0Automatic shutdown: 5 minutesBattery: 3*1.5 LR44 batteryScreen size: 33*24mmSize: 183*37*37mm (7.2*1.5*1.5in)Display: Support backlightWaterproof rating: IP67Power consumption: 2.9 mAConductivity test range: 0 to10000uS/cm, 10. 1-19.99ms, 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; 0.1pptAccuracy: ±2% of readingSalinity measurement range: 0.00 to 25.00%Resolution: 0.01%Accuracy: 0.01-5.00% (±0.1%) 5.10-25.00% (±1%)pH test range: 0.01-14.00pHResolution: 0