Electronic pH meter, 5 in 1 pH tester for swimming pools with backlight, pH/TDS/EC/salinity/temperature with ATC, high precision pH meter with a resolution of 0.01, for drinking water, aquariums and s

【5-in-1 Function】Water tester with pH, TDS, and temperature (EC) measurement functions. The bright LCD screen makes it easy to read the displayed values. Easy to Use: Press and hold the power button. Press "HOLD" to change the temperature. 【Absolute Accuracy】pH Resolution: 0.01 pH, accuracy ±0.05 pH. TDS Meter Resolution: 1 ppm 0.1 ppt, accuracy ±2%. Conductivity Resolution: 1 µS/cm 0.1 mS/cm, accuracy ±2%. Thermometer Resolution: 0.1 °C/°F, accuracy ±0.5 °C. Desalination Resolution: 0.01%, accuracy 0.01-5.00% (±0.1%), 5.10-25.00% (±1%). 【Large Capacity】Ideal for home or laboratory use. Convenient watering nozzle, nozzles, aquariums, water treatment. 【Robust and Durable】The pool nozzle, IP67 certified, can be used continuously, even in an aquarium. If the outlet remains exposed to air for an extended period, the displayed value may become unstable. You can easily recalibrate the tester by simply recalibrating the device.   Quality Guarantee: 5-in-1 Water Quality Tester pH Calibration 4.00 pH Calibration 6.86 pH Calibration 9.00 Instructions for Use Features: Auto LCD Calibration Calibration IP67 Auto Shut-Off Easy to Use Value/Temperature Selector Press "ON" to turn on the indicator light, press "HOLD/TEMP" to activate the selector, and then press and hold "HOLD/TEMP" to change the temperature. Using the mode selector Press “ON” to turn on the indicator light, press “MODE/CAL” to cycle through the other modes. Fast and Accurate Standard Measurements 1. Before unpacking, add the pH 4.00/pH 6.86/pH 9.18 buffer solution, then pour it into the 250 ml water bottle until completely dissolved. 2. Press the "ON/OFF" button to switch to pH meter mode. 3. Set the electrode resolution to the standard pH of 6.86. Wait for the reading to stabilize (usually 5 to 10 seconds). 4. Press the "MODE/C" button to continue the reading for 6 seconds. Then release it to continue the measurement. 5. Repeat the steps to complete the precipitation at pH 4.00/pH 9.18 in order. NOTE: Follow the instructions carefully to ensure the correct pH values are 6.86, 4.00, and 9.18. In other words, the exact pH is 9.18. For more information about the operation, see https://files.fm/u/e2w326wwvg ></>></>>