WEKSUN pH Meter and TDS Meter Digital pH Meter for Water High Accuracy Water Quality Tester Pen pH and TDS Meter Combo with Back Light Screen Water Testing Kit for Drinking Water Aquarium Swimming Pool

WEKSUN PH meter and TDS tester can be used in water purifiers and filters, food (vegetable, fruits) & drink quality monitoring, pools and spas, aquariums, hydroponics. Hold Function: Instrument will lock the measure result when you press HOLD button two times, also it will be automatic locked without pressing any key when nuamerical stable. After locked, press the MODE button to convert to the result of different mode. Press CLEAR button to unlock. Automatic Temperature compensation: - The TDS Meter have automatic temperature compensation function. - The TDS Meter has memory function, the boot mode is the last time shutdown mode. NOTE: - Avoid heat, direct sunlight - When the display value is fuzzy or unshown,the battery should be replaced promptly(Pay attention to the polarity of batery) - Please adopt standard buffer solution to calibrate, incorrect calibrate would cause result error, thus affecting the accuracy of measurement, or cause the instrument not working. (Note: Doesn’t contain PH4.01, PH6.86, and PH9.18 buffer powder) - Instrument isn't waterproof, don't throw the TDS Meter into the solution or make the solution over the immersion line, to avoid the circuit board short out. - If you have done all step as the manual,the meter still does not work, please contact us as soon as possible. Specification: PH Meter: - Range: 0.00-14.00pH - Resolution: 0.01pH - Accuracy: ±0.1pH - Power supply: 2*1.5V(LR44 Button Cell) - Operating Temp: 0? - 80? - Size: 15.cm*3cm*1.5cm Measure Range of TDS Meter: TDS: 0 - 9999 ppm Concuctivity: 0 - 9999 us/cm Celsius: 0.1 - 80.0? Fahrenheit: 32.0 - 176.0°F Package Includes: 1 x PH Meter 1 x TDS Meter 1 x Manual