Electronic pH Meter, 5-in-1 Pool Water Tester with Backlight, pH/TDS/EC/Salinity/Temperature with ATC, High Precision 0.01 Resolution pH Meter, for Drinking Water and Aquariums

Product Information 【5-in-1 Function】 This is a water testing kit with a pH tester, TDS meter, and EC salinity/temperature tester. The backlit LCD screen makes it easy to read the displayed values. 【Easy to Use】 Press the power button to turn on. Press "HOLD" to lock the value, press and hold "HOLD" to change the temperature unit. Press "MODE" to switch between the different functions. 【Absolute Accuracy】 pH resolution is 0.01 pH, accuracy ±0.05 pH. TDS meter resolution is 1 ppm (0.1 ppt), accuracy ±2%. Conductivity resolution is 1 µS/cm (0.1 mS/cm), accuracy ±2%. Thermometer resolution is 0.1°C/°F, accuracy ±0.5°C. Salinity resolution 0.01%, accuracy 0.01-5.00% (±0.1%), 5.10-25.00% (±1%). 【Wide Application】 Ideal for home or laboratory use. Suitable for testing the pH balance of drinking water, swimming pools, aquariums, RO systems, spas, or hydroponic systems. 【Robust and Durable】 This pool tester is IP67 waterproof, so it can continue to be used even if it falls into the aquarium. If the electrode is left in place for a long time and exposed to air, the readings will be slow and unstable due to the electrode drying out. You must immerse the electrode in water for a few hours and recalibrate the device before use. What's in the package: 5-in-1 Water Quality Tester, pH 4.00 Calibration Powder, PH 6.86 Calibration Powder, PH 9.00 Calibration Powder, Operating Instructions. Features: Automatic calibration, Backlit LCD screen, IP67 waterproof, Automatic shut-off, Easy to use, Lock value/temperature switch: Press the "ON" button to turn on, press the "HOLD/TEMP" button to lock the value, and press and hold "HOLD/TEMP" to change the temperature unit. Use the mode switch: Press the "ON" button to turn on, touch "MODE/CAL" to switch between modes. Quick and Accurate Calibration of pH Meters 1. Before calibration, add the pH4.00/pH6.86/pH9.18 buffer powder to a container with 250 ml of distilled water and stir until the powder is completely dissolved. 2. Press the "ON/OFF" button to turn on the pH meter and switch to pH mode. 3. Place the electrode in the pH6.86 standard solution and wait for the reading to stabilize (usually 5 to 10 seconds). 4. Press and hold the MODE/CAL button for 6 seconds and release it until the pH6.86 reading stops flashing and the pH6.86 calibration is complete. 5. Repeat the above steps to complete the pH4.00/pH9.18 calibration in order. NOTE: Always strictly follow the calibration sequence of pH 6.86, pH 4.00, pH 9.18. Otherwise, the calibration result will be inaccurate. For more operating videos, please visit the link https://files.fm/u/e2w326wwvg